NaCl is more reactive than NaBr because Cl is more electronegative than Br and it is smaller than Br, thus, can be easily attack other compounds.
What is NaCl?NaCl is an ionic compound formed thorough the electrons loss from the metallic sodium to chlorine. Sodium has one valence electron which can be easily lost to electronegative non-metals such as halogens.
Halogens such as chlorine, fluorine etc. are highly electronegative and easily gain one electrons from metals. The electronegativity of atoms decreases down a group. Thus, F is much more electronegative than Cl which is more electronegative than Br than I.
NaBr is an ionic compound similar to NaCl. However, Br is bigger in size and less electronegative than Cl that's why it is chemically less reactive in comparison to NaCl.
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The effective nuclear charge, Zeff, experienced by valence electrons in an atom can be estimated from the equation:
Zeff = the number of protons – the number of core electrons
Using this estimation, effective nuclear charge for Main Group elements would ___ left to right across a period and ___ down a group.
Effective nuclear charge for Main Group elements would increases left to right across a period and decreases down a group.
What is effective nuclear charge?Effective nuclear charge is the positive charge that nuclear protons have and that attracts valence electrons. Due to the shielding effect, the effective nuclear charge is always smaller than the total number of protons present in a nucleus.
Over time, effective nuclear charge increases but electron shielding stays the same. This draws the electron cloud closer to the nucleus, increasing the nuclear attraction to the outermost electron and making removal more difficult (requires more energy).
As we travel down the group, electrons are added to a new orbital, increasing the atomic size and decreasing the impact of the nucleus on the outermost electron, resulting in a lower value of the effective nuclear charge.
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Which option correctly describes a model of methanol, CH₃OH ?
The Correct Option is :
One grey sphere, Four white spheres, and One red spheres.
For the pair of compounds CH 3 CH 2 CH 2 OH or CH 3 OH the one with the higher vapor pressure at a given temperature is?
Vapor pressure is always going to be inversely proportional to the boiling point. The low the boiling point, compound will have the higher vapor pressure.
1. CH₃OH exhibits the low boiling point in comparison to CH₃CH₂CH₂OH that exhibits the high boiling point. So, CH₃OH has high vapor pressure.
2. CH₃OH is polar and it exhibits high boiling point because of hydrogen bonds, in comparison H₂CO exhibits low boiling point and has no hydrogen bonds. So, H₂CO has high vapor pressure.
3. CH₄ is non-polar solvent and exhibits less boiling point in comparison to that of CH₃Cl, which is polar and exhibits high boiling point. So, CH₄ has high vapor pressure.
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When boiling water on a natural gas (methane) burner, which of the following processes converts chemical potential energy to heat?
A. methane is burning
B. the combustion reaction between methane and oxygen C. Combustion of hydrocarbons, such as the methane in natural gas
D. releases large amounts of heat because the chemical bonds being formed are stronger than the bonds broken.
The processes that converts chemical potential energy to heat is: C. Combustion of hydrocarbons, such as the methane in natural gas.
The Benefits of Utilizing Natural Gas for Boiling WaterBoiling water is a necessary task for a variety of purposes, and natural gas is a powerful and reliable source of energy used for this purpose. Natural gas is a clean and efficient energy source that can be used to heat homes, water, and even cook food. It is also an environmentally friendly alternative to other energy sources, such as coal and oil, which are more harmful to the environment. This essay will discuss the benefits of utilizing natural gas for boiling water.
One of the primary advantages of using natural gas for boiling water is its affordability. Natural gas is a relatively inexpensive fuel source, and it is also easy to access. As a result, it is a cost-effective way to boil water, as it is more cost-effective than other fuel sources, such as electricity and propane. In addition, natural gas is a clean fuel source, as it does not generate any harmful emissions when burned. This makes it an ideal choice for boiling water, as it does not contribute to air pollution.
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in the titration of a diprotic acid with naoh ... the volume of naoh solution used to reach the first equivalence point is half the volume of naoh used to go from the first equivalence point to the second equivalence point. the volume of naoh solution used to reach the first equivalence point is equal to the volume of naoh used to go from the first equivalence point to the second equivalence point. the volume of naoh solution used to reach the first equivalence point is twice the volume of naoh used to go from the first equivalence point to the second equivalence point. the volume of naoh solution used to reach either the first or second equivalence point depends on the volume of the beaker used in the titration.
The correct option is c)the volume of the NaOH solution used to reach the first equivalence point is twice the volume of NaOH used to go from the first equivalence point to the second equivalence point.
A titration is a type of experiment that is used to determine the amount of a certain substance contained in a sample. A diprotic acid is an acid that can donate two protons (H+) per molecule. When performing a titration of a diprotic acid with NaOH, there are two equivalence points, or points when the number of moles of acid is equal to the number of moles of base.
The first equivalence point occurs when all of the acids have been neutralized, while the second equivalence point occurs when the excess base has been neutralized. The volume of NaOH solution used to reach the first equivalence point is twice the volume of NaOH used to go from the first equivalence point to the second equivalence point.
This is because, for each mole of acid, two moles of the base are required to reach the first equivalence point, while for each mole of acid, only one mole of the base is required to reach the second equivalence point. Therefore, twice as much base is required to reach the first equivalence point compared to the second equivalence point. The volume of the beaker used in the titration does not affect the amount of NaOH used to reach either the first or second equivalence point.
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Compared to the circumference of the Earth Measured at Equator, the circumference of Earth measured through the poles is
Compared to the circumference of the Earth Measured at the Equator, the circumference of the Earth measured through the poles is slightly smaller.
What is the circumference of a circle or sphere?The circumference of a circle or sphere is the distance around the sphere or circle.
The circumference of the Earth varies from the equator to the North or South Poles.
The reason is that the shape of the earth is not completely spherical, but is elliptical.
Hence, at the North and South poles, the circumference of the earth is smaller than at the equator.
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According to measurements taken in the 1990s, the levels of inorganic nitrogen in Arctic ecosystems were substantially lower than the amount of nitrogen actually taken up by plants. Which of the following is a possible explanation for this pattern?
Arctic sedges can take up organic forms of nitrogen.
The levels of inorganic nitrogen in Arctic ecosystems were substantially lower than the amount of nitrogen actually taken up by plants as : Arctic sedges can take up organic forms of nitrogen.
What is Arctic ecosystem?Arctic is a unique ecosystem with complex food web made up of organisms adapted to extreme conditions and is one of the most biologically productive ecosystems supporting many large fisheries and migratory birds that come to the Arctic in the summer to breed.
Nitrogen lack is related to the soil type. Excessive irrigation and heavy rains causes nitrogen deficiency because of overwatering. Lack of soil moisture hinders the absorption of water-soluble nutrients by plant roots.
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When a base is made into an aqueous solution, it ___
The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, when a base is made into an aqueous solution, it is called alkali.
What are acid and base?Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.
pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion. when a base is made into an aqueous solution, it is called alkali.
Therefore, when a base is made into an aqueous solution, it is called alkali.
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TRUE OR FALSE yeast cells, saccharomyces cerevisiae, were incubated with and without glucose at three different temperatures for a period of four minutes, during which the rate of co production was measured with a co sensor.
The answer is true. The yeast engages in aerobic respiration in the presence of oxygen, converting carbohydrates (a source of sugar) into carbon dioxide and water.
The yeasts do fermentation in the absence of oxygen, turning carbohydrates into alcohol and carbon dioxide. Aerobic growth is substantially better for yeast cells. They cannot execute oxidative phosphorylation in anaerobic conditions, therefore they must manufacture all of their ATP through less effective glycolysis. When there is water, sugar, and no oxygen present, yeasts perform fermentation. The yeasts engage in anaerobic respiration, which implies their metabolic processes do not include the consumption of oxygen.
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Fill in the Blank.
Mass - measured in Kilograms or _____. Tells the amount of matter in an object.
it's Gram because why not
Hello, Tia! Mass is measured in kilograms or grams. It tells the amount of matter in an object.
Please give me brainliest for more high quality answers! - longstretch
How many grams of barium hydroxide are required to react with 12.2 grams of caesium phosphate?
Taking into account the reaction stoichiometry, a mass of 6.24 grams of Ba(OH)₂ are required to react with 12.2 grams of caesium phosphate.
Reaction stoichiometryIn first place, the balanced reaction is:
3 Ba(OH)₂ + 2 Cs₃PO₄ → Ba₃(PO₄)₂ + 6 CsOH
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Ba(OH)₂: 3 molesCs₃PO₄: 2 molesBa₃(PO₄)₂: 1 moleCsOH: 6 molesThe molar mass of the compounds is:
Ba(OH)₂: 168.3 g/moleCs₃PO₄: 493.7 g/moleBa₃(PO₄)₂: 592.9 g/moleCsOH: 149.9 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Ba(OH)₂: 3 moles ×168.3 g/mole= 504.9 gramsCs₃PO₄: 2 moles ×493.7 g/mole= 987.4 gramsBa₃(PO₄)₂: 1 mole ×592.9 g/mole= 592.9 gramsCsOH: 6 moles ×149.9 g/mole= 899.4 gramsMass of Ba(OH)₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 987.4 grams of Cs₃PO₄ react with 504.9 grams of Ba(OH)₂, 12.2 grams of Cs₃PO₄ react with how much mass of Ba(OH)₂?
mass of Ba(OH)₂= (12.2 grams of Cs₃PO₄× 504.9 grams of Ba(OH)₂)÷ 987.4 grams of Cs₃PO₄
mass of Ba(OH)₂= 6.24 grams
Finally, a mass of 6.24 grams of Ba(OH)₂ are required.
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if all the n2 and h2 are consumed, what volume of nh3 , at the same temperature and pressure, will be produced? express your answer using two significant figures.
Volume of NH3,at the same temperature and pressure, will be 3.8L
First permit's write the balanced equation for the response :
⇒
via analyzing the coefficients of the response we discover that the relationship among the compounds is
(I)which means that as an example with 1 mole of and with 3 moles of we are able to acquire 2 moles of
1 mole of gas at STP (wellknown Temperature and pressure) has a quantity of 22.4 L
The moles and the extent in liters vary immediately consequently we are able to work with the volume and the connection (I)
If we divide the volume of and we gain :(II)The range in (II) satisfies the connection (I) so we are able to write in phrases of liters that :
With of and of (three instances greater liters that ) we will produce of (two times greater liters that ) satisfying the connection (I)
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What is the pH of a 0.380 M solution of HNO₃?
pH of the solution is the negative logarithm of its H+ ion concentration. Nitric acid solution contains equal-molar H+ and nitrate ions. The pH of 0.380 M HNO₃ solution is 0.42.
What is pH?pH of a solution is its measure of H+ ion concentration. It tells how much acidic or basic the solution is. The solution is neutral at a pH of 7 , acidic at pH below 7 and basic above 7.
Mathematically pH is the negative logarithm of H+ ion concentration. HNO₃ ionizes to equal H+ ions and NO₃ - ions. Thus, 0.380 M solution contains 0.380 M H+ ions.
pH = - log [H+]
= - log (0.380 M)
= 0.42
Therefore, the pH of the nitric acid solution is 0.42.
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For the following chemical equation 2 Al (s) + 6 HCl (aq) ----> 2 AlCl3 (aq) + 3H2 (g) How many grams of Al should be mixed with hydrochloric acid to obtain the hydrogen gas conditions of 2.06 L, 301 K and 2.25 atm?
Answer:
Your answer will be 34.5 g
Explanation:
The molar mass of aluminum (Al) is 26.98 g/mol. In the formula above, replace the values. This results in 34.5 g of aluminum (Al) being required.
use the appropriate standard reduction potentials below to determine the equilibrium constant at 401 k for the following reaction under acidic conditions.
The equilibrium constant of the redox reaction system is gotten as 3.67 * 10^11.
What is the equilibrium constant at 401 K?We know that the equation as it is a redox reaction. We would need to obtain the standard electrode potential of the cell and use this information to get the free energy of the system. Then we can now substitute values to get the equilibrium constant.
Now;
ΔG = -nFEcell
ΔG =Change in free energy
n = Number of moles of electrons
F = Faraday's of electricity
Ecell = Cell potential
Ecell = 1.23 V - 0.770 V
= 0.46 V
Then;
ΔG = -(2 * 96500 * 0.46)
ΔG = -88780 kJ/mol
Now we have;
ΔG = -RTlnK
R = gas constant
T = temperature
K = equilibrium constant
-88780 = -(8.314 * 401 * lnK)
lnK = -88780/ -(8.314 * 401)
lnK = 26.6
K = 3.67 * 10^11
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Determine the direction of electron flow and label the anode and the cathode. Label each electrode as negative or positive. Drag the appropriate labels to their respective targets. Write a balanced equation for the overall reaction. Express your answer as a chemical equation. Identify all of the phases in your answer. Calculate Eocell Express your answer using three significant figures.
Previous question
The direction of electron flow from the anode and the cathode is the when the current is flow in the opposite direction.
An electrochemical cell have the a cathode and an anode. the anode one is the positively charged and the an anode one is negatively charge. so, the electron flow from the anode to the cathode that is the positively charged end to the negatively charged end and the current will flow in the opposite to direction.
The direction of the current is from the cathode to the anode. the electrochemical cell is non spontaneous and is called as electrolytic cell.
The question is incomplete, I answer the question in general according to my knowledge.
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in vitro and in vivo inhibition of the mycobacterium tuberculosis phosphopantetheinyl transferase pptt by amidinoureas.
The important enzyme phosphopantetheinyl transferase, crucial for the manufacture of cellular lipids and virulence factors in Mycobacterium TB, has recently been verified as a target for the treatment of tuberculosis.
Amidinourea (AU), a recently discovered inhibitor, was investigated in terms of the structure-activity connections, with an emphasis on the biochemical potency, identification of active molecules' whole-cell on-target activity, and profiling of specific active congeners. The TB-causing Mycobacterium tuberculosis (Mtb) has a complicated cell wall that makes it difficult for potential antibiotic molecules to penetrate it. But there are lots of potential pharmacological targets in the biological processes that produce the cell wall. Mycolic acids are lipids that are typically present in the cell walls of mycobacteria. Delamanid and pretomanid, two TB medications developed since 2012, block the formation of mycolic acids, albeit it is unclear exactly how they work.
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Which molecule has polar bonds? *
CF4
CI2
F2
H2
Answer:
The ONLY compound that has polar bonds is CF4
Explanation:
Any elements or free atoms DO NOT have any polar bonds, they only have London Dispersion Forces, which is not considered a polar force.
Only Dipole-Dipole and Hydrogen Bonds are considered to make a molecule polar. CF4 has dipole-dipole bonds (In addition to London Dispersion Forces) Making it Polar.
Cl2, F2, H2 ONLY have London dispersion which means it is not polar
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Which pair of aqueous solutions, when mixed, will form a precipitate?-NaNO3 and AgC2H3O2-K3PO4 and NH4Cl-NaOH and KCl-NaOH and ZnCl2
The offered assertion claims that a mixture of the aqueous solutions of KCl and NaO will result in the formation of a precipitate.
What distinguishes water from aqueous media?The word "aqueous" in an equation denotes a substance that is disseminated in fluids (a solution in water). For instance, sodium chloride aqueous solution is produced by adding sodium hydroxide solution to diluted hydrochloric acid. When liquid is used to describe a reaction, liquid substances are formed.
Do you mean liquid by aqueous?Liquids that are practically incompressible are classified as liquids, whereas aqueous liquids are those in which water serves as the solvent. This is the main distinction between liquids and aqueous fluids. Electrolytes are a sort of liquid as a result.
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What is VSEPR theory?
[tex][\huge\color{cyan}\boxed{\colorbox{red}{ANSWER}}[/tex]
The Valence Shell Electron Pair Repulsion Model is often abbreviated as VSEPR (pronounced “vesper”).
It is basically a model to predict the geometry of molecules. Specifically, VSEPR models look at the bonding and molecular geometry of organic molecules and polyatomic ions. It is useful for nearly all compounds that have a central atom that is not a metal.
Explanation:
Importance of VSEPR Models:-Lewis structures only tell the number and types of bonds between atoms, as they are limited to two dimensions. The VSEPR model predicts the 3-D shape of molecules and ions but is ineffective in providing any specific information regarding the bond length or the bond itself.VSEPR models are based on the concept that electrons around a central atom will configure themselves to minimize repulsion, and that dictates the geometry of the molecule.It can predict the shape of nearly all compounds that have a central atom, as long as the central atom is not a metal. Each shape has a name and an idealized bond angle associated with it.[tex]\small\color{red}\boxed{\colorbox{blue}{ BOARINGBOY}}[/tex]
what is the chemical reaction caused the by bath bombs in water?
How is density calculated? give an example and units
An unknown element X has the following isotopes: 52X (90.00%
abundant, atomic mass = 52.04 amu), 4⁹X (8.00% abundant, atomic
mass = 48.99 amu), and 5ºX (2.00% abundant, atomic mass = 50.09
amu). What is the average atomic mass of X in amu?
The isotopes of element X are 52X (90.00%, atomic mass: 52.04 amu), 4⁹X (8.00% abundant, atomic mass: 48.99 amu), 5ºX (2.00% abundant, atomic mass: 50.09 amu). X has average atomic mass of 151.12 amu.
An easy definition of an isotope:Isotopes are atoms containing the same atomic mass but differing numbers of neutrons. They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.
Why are isotopes created?High-speed particles can be fired into an atom's nucleus to achieve this. The nucleus may either absorb the electron by becoming unstable and emit one when it is struck. In either scenario, the nucleus's particle count would change, resulting in the creation of an isotope.
Briefing:
To solve a problem like this, we can multiply mass of each isotope by the percentage abundance of that isotope
Add all the amu
52.04amu + 48.99 amu + 50.09 amu= 151.12 amu.
The average atomic mass of element X is 151.12 amu.
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If the perceived color of a solution is green, what is the approximate wavelength of light that is being absorbed? (use the color wheel)
The wavelength of light that is absorbed falls between 490 and 530. On the visible color spectrum, green lies between cyan and yellow. Light with a prominent wavelength of 495–570 nm is used to evoke it.
What are the color wheel's 12 primary hues?The color wheel has 12 primary colors. These colors are red, orange, yellow, spring green, chartreuse green, blue, violet, magenta, and rose on the RGB color wheel. There are primary, secondary, and tertiary hues on the color wheel.
Explain what a color wheel is?The color wheel, also known as a color circle, is a circular collection of hues arranged according to how chromatically similar they are to one another.
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calculate the molar concentration for h2so4 for the following situation. when 27ml of it was completely titrated by 19ml of 0.90m koh, 1mol of acid was titrated by 2mol of base. give your answer in two significant figures.
The Molar concentration for the H2SO4 titrated against base is 8.55M.
Traditionally, a concentration method that is widely used is the molar concentration unit [mol/ L (M)]. It is the amount of target substance i.e. solute in 1 liter of solution, expressed in moles. The concentration can be calculated as shown below.(1-liter solution weight) x (purity) molecular weight [Specific gravity of solution (g/mL) times 1,000 (mL) times purity (w/w percent) /100 Molecular weight]This calculation, can be used to carry out a variety of calculations for creating molar solutions when working with solid materials. It is designed for use in both the teaching and research labs. For instance, the mass of the chemical required to create a solution can be calculated using the solute concentration, desired solution volume, and the chemical's known molecular weight. As opposed to this, if the desired concentration is known, but only a small amount (i.e. e. When a very small amount (e.g., mass) of the chemical is purchased, e.g. g. , 10 mg), then the total volume of solution required to dissolve the solid material to reach the desired final concentration can be calculated.Molar concentration=MV=0.90 x 19=17.1
Titrated against 2 mol base so dividing the molar concentration with 2 and finally getting required result.
New molar concentration=17.1/2=8.55M
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A meteorologist noticed a strong low pressure system (yellow circle in this image) moving into the state of California. What is the most likely forecast for California?
A. clear and calm
B. drought conditions with sunny skies
C. windy with rainy conditions
D. several days without rain or wind
The forecast for California would be windy with rainy conditions.
What is pressure?
Different units are used to express pressure. Some of these come from a unit of force divided by a unit of area.The SI unit of pressure, the pascal (Pa), is, for example, one newton per square meter (N/m2); similarly, the pound-force per square inch (psi) is the traditional unit of pressure in the imperial and US customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; an atmosphere (atm) is equal to this pressure and a torr is defined as 1⁄760 of this. Manometric units such as centimeter of water, millimeter of mercury, and inch of mercury are used to express pressures in terms of the height of a particular fluid column in a manometer.To know more about pressure, click the link given below:
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What kind of reaction is 2C₂H² + 70₂(g) → 4CO₂ + 6H₂O?
A. A synthesis reaction
B. A decomposition reaction
C. A combustion reaction
D. A single-replacement reaction
Answer:
C. combustion reaction
combustion reaction is a type of reaction that involves the reaction of a compound with oxygen gas to release energy
Answer:
C. A combustion reaction
Explanation:
Every hydrocarbon has a property of combustion
Ethyne and Oxygen form Carbon Dioxide and Water.
Ethyne aka Acetylene
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If one had a parking garage that was filled with cars such that each parking spot was occupied, it would make intuitive sense that if we had twice as many cars, the parking garage would need to be twice as big to maintain car density within the garage. But, is the same thing true if one is concerned with gas particles and not cars? The answer is Yes. More than a century ago Italian chemist Amadeo Avogadro postulated that V, the volume of a gas and n, the number of gas particles are directly proportional, when the temperature and pressure are held constant. Part A Avogadro's Law states that at a given temperature and pressure, what quantity is constant? ► View Available Hint(s) O V + n Vxn Submit Part B If it takes three "breaths" to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 L balloon? Express answer to two decimal places and include the appropriate units. ► View Available Hint(s) μÀ Value Units ?
According to Avogadro's law, equal volumes of various gases each contain an equal number of molecules at the same temperature and pressure. Under the presumption of an ideal (perfect) gas, this empirical relation can be deduced from the kinetic theory of gases.
Avogadro's number, or the Avogadro constant, is the precise number of molecules in one gram-mole of a substance, defined as the molecular weight in grams, which is equal to 6.02214076 1023. As an illustration, since oxygen has a molecular weight of 32.00, one gram-mole of oxygen weighs 32.00 grams and contains 6.02214076 1023 molecules.
According to Avogadro's rule, the volume occupied by one gram-mole of gas is approximately 22.4 litres (0.791 cubic foot) at standard temperature and pressure (0 °C, 1 atmosphere).
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is there any difference between how warm or cold an object feels and it’s temperature
Yes there is so many difference between warm or cold an object feels and its tempreture.
What is object?An object is an abstract data by the type with the addition of polymorphism and to the inheritance. Rather than thd structure of the programs as code and data, an of the object-oriented system from its the integrates the two using the concept of an "object". An object has state by (data) and behavior (code). Objects can correspond to things found in the real world.
Yes the sense of touch by the human skin is differently
Because hot object can be the sense burn whereas cold object sense cool and shiver and it is
The hot body radiated energy and temperature in environment and become normal
But cold object absorb to the energy from the environment and become normal.
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if the pressure on a gas increased then its a volume will decrease because gas molecules will pushed closer together
did the data support the hypothesis
justify your answer
If the pressure on a gas increased then its a volume will decrease because gas molecules will pushed closer together, the data support the hypothesis.
Why does the pressure of a gas increase as the volume decreases?If the volume of the gas decreases, the molecules strike the walls more frequently, raising the pressure; conversely, if the volume grows, the distance the molecules must travel to strike the walls increases, and they strike the walls less frequently, lowering the pressure.
Gases have the ability to expand to fill almost any volume and can be compressed to minuscule fractions of their original capacity. When gas molecules are forced together to the point where they meet, the material becomes liquid. Cooling a gas and compressing it are two methods for turning it into a liquid.
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The complete question is as follows:
If the pressure on a gas is increased, then its volume will decrease because the gas molecules will be pushed closer together. Did the data support the hypothesis (above)? Justify your answer. Sample Justification: As weight was added to the top of a syringe, the volume of the air trapped in the syringe decreased. The weight and the surface area of the plunger were used to calculate pressure. As more weight was added, the pressure increased. The volume decreased in response. Did you mention that adding weight increased the pressure? Did you mention that volume decreased as the pressure increased?
In one to two sentences, explain how this reaction demonstrates that matter is neither created nor destroyed in a chemical reaction.
Since the number of atoms which are reacting are equal to the number of to the number of atoms in the product, this reaction demonstrates that matter is neither created nor destroyed in a chemical reaction.
What is the principle of matter conservation?Any system that is closed to all exchanges of matter and energy is subject to the law of conservation of matter, which is a general law of physics and chemistry. This law states that regardless of how the components rearrange themselves, the mass of an object or group of things remains constant over time.
A chemical reaction is what?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another. Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that solely affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei.
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Calculate the amount of heat needed to melt 199. g of solid ethanol (CH3CH2OH) and bring it to a temperature of significant digits. Also, be sure your answer contains a unit symbol.
86,472.46 J
The heat required to melt ethanol can be calculated using the formula:
heat = mass × heat of fusion
After plugging in the values it looks like this:
Heat = 199 g × 109.1 J/g
= 21489.9
In order to heat the molten ethanol to a higher temperature, the heat capacity of ethanol must also be considered. The heat capacity of ethanol is 2.44 J/g × degree Celsius. To bring the molten ethanol to a sufficient temperature, we need to know the desired final temperature and the initial temperature (the melting point of ethanol, -114.1 degrees Celsius). Let's say the desired final temperature is 25 degrees Celsius.
The heat required to raise the temperature of molten ethanol can be calculated using the formula:
heat = mass × heat capacity × (final temperature - initial temperature)
After plugging in the values it looks like this:
Heat = 199 g × 2.44 J/g degrees Celsius × (25 degrees - (-114.1 degrees))
= 199 g × 2.44 J/g degrees Celsius × 139.1 degrees
= 64982.56 J
add 21489.9 J + 64982.56 J = 86,472.46 J
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