Answers
The classification of given substances is as follows:
Ag is the Atomic element.
F₂ is the Molecular element.
CO is the Molecular compound.
PbI₄ is the Ionic compound.
What are ionic compounds?Crystalline solids are formed by tightly packed ions of opposite charge. Ionic compounds are usually formed when metals react with non-metals. Elements can gain or lose electrons to reach the next noble gas configuration. The formation of ions (by gaining or losing electrons) to complete octets helps them stabilize.
In reactions between metals and nonmetals, metals generally lose electrons to complete octets, while nonmetals gain electrons to complete octets. Metals and non-metals generally.
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Related Questions
When a base is made into an aqueous solution, it ___
Answers
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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Considering only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4 species that are isoelectronic with the telluride ion, Te2-.
Answers
Since chlorine only has 17 electrons, the atoms 1+ and 2+ require argon & potassium, that have 18 and 19 electrons, respectively. We require the atoms S- & P-2, which have 16 & 15 electrons respectively, for 1 and 2.
What is the charge?When the number of protons within the nucleus is different from the amount of electrons around that nucleus, an electrical charge is created in the atom of matter. A negative charge is present in an atom if it contains more electrons than protons. A positive charge is present in an atom if there are more protons than electrons.
What is the name of the SI unit of charge?Ampere-second or Coulomb are the SI units for measuring charge.
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In 1939, 740 migrant ship passengers were turned away from which city port, despite having immigration papers?
A. Barcelona
B. Miami
C. Berlin
D. London
Answers
In 1939, 740 migrant ship passengers were turned away from London city port, despite having immigration papers.
Why migrant ship passengers were turned away from London?In 1939, the passenger ship MS St. Louis was carrying 740 Jewish refugees who had fled Nazi-occupied Europe and were seeking asylum in the United States. The ship had been turned away from Cuba, and when it arrived in Miami, the U.S. government also refused to allow the passengers to disembark.
The ship then headed to Canada and was turned away from Montreal. Finally, it arrived in the port of London, where it was also denied permission to land. The passengers were forced to return to Europe, and many of them later died in the Holocaust. The incident is a tragic example of the difficulties faced by Jewish refugees during World War II and the lack of political will to provide them with a safe haven.
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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?
Answers
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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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.
Answers
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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is there any difference between how warm or cold an object feels and it’s temperature
Answers
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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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
Answers
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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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
Answers
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
\quora
Multiple choice (easy)
Answers
In this reaction, CuSO₄₍s₎ + 2HI₍aq₎ are reactant . Copper sulphate present in solid state and HI is present in aqueous state. Therefore, option B is correct.
What is copper sulphate ?Copper sulfate is used in agriculture and non-agricultural settings as a fungicide, algaecide, root killer, and herbicide. It's also an antimicrobial and a molluscicide. Individual products containing copper sulfate have a wide range of applications.
Copper and sulfuric acid are the two main ingredients used to make copper sulphate, but simply adding copper to a diluted acidic solution will not promote the oxidation reaction.
When pure copper sulphate is kept in water, it begins to dissolve, and a small amount of heat energy is released during the process. Its color changes to blue as 5 molecules of water cling to it.
Thus, option B is correct.
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Answer:
reacrans
Explanation: you are correct lol
In virtually every stable compound, each of the atoms has achieved an electron configuration analogous to that of the ______ elements.
Answers
In virtually every stable compound, each of the atoms has achieved an electron configuration analogous to that of the noble elements.
Noble elements are those which have completely filled orbits, they are highly stable compounds, they do not react under normal conditions.
All the chemical compounds and elements have tendency to be stabilized by achieving the nearest inert electronic configuration.
They are classified as non-metals and they come under p-block elements. They have a complete octet; therefore, their electronic configuration is n[tex]s^{2}[/tex]n[tex]p^{6}[/tex],Their ionization enthalpy has a very high value, but xenon can react with highly electronegative atoms like oxygen and fluorine to form corresponding xenon compounds.
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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.
Answers
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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The question that I have is in the photo
Answers
Answer: 0.101
Explanation:
Using the fact that molarity = (moles of solute)/(liters of solution), there are [tex](0.150)(35.5/1000)=0.005325[/tex] moles of barium hydroxide.
There are 2 moles of hydroxide ions per mole of barium hydroxide, meaning that there are [tex](0.005325)(2)=0.01065[/tex] moles of hydroxide ions.
To neutralize the solution, the number of moles of hydrogen ions must be equal to the number of moles of hydroxide ions.
Since there is 1 mole of hydrogen ions per mole of nitric acid, we need 0.01065 moles of nitric acid.
Substituting into the molarity formula yields that the concentration is [tex]\frac{0.01065}{0.105}=0.101[/tex] M.
The central atom in the iodite ion, IO21-, is surrounded by
a. two bonding pairs and two unshared pairs of electrons.
b. three bonding pairs and one unshared pair of electrons.
c. one bonding pair and three unshared pairs of electrons.
d. two double bonds and no unshared pairs of electrons.
Answers
The central atom in the iodite ion, IO21-, is surrounded by two bonding pairs and two unshared pairs of electrons.
What is a central atom?The center atom in a molecular formula is often the atoms with the smallest subscript and the largest bonding potential. The lowest electronegative atom is normally the central atom when all the atoms typically make the same number of bonds. The main ion in K3[Fe(CN)6] is Fe3+. These central atoms & central ions serve as Lewis acids, or acceptors of a electron pair.
Why is the O atom at the center of H2O?Here, the oxygen atom at the center has undergone hybridization. So there are 3 2p orbitals and a 2s orbital when we look at the creation of the water molecule. The 4 sp3 hybrid orbitals are produced by these together.
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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)
Answers
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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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 ?
Answers
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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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.
Answers
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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in vitro and in vivo inhibition of the mycobacterium tuberculosis phosphopantetheinyl transferase pptt by amidinoureas.
Answers
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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Suppose that 0.610 mol of methane, CH4(g), is reacted with 0.760 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat (in kJ) is released?
Answers
The reaction occurs at constant pressure, - 385.89 kJ amount of heat is released during the reaction.
The heat released by any reaction will be calculated as:
ΔH = ΔH of products - ΔH of reactants
Given chemical reaction is:
2CH₄ + 5F₂ → 2CF₄ + 2HF
From the stoichiometry of the reaction, it is clear that,
2 moles of CH₄ = react with 5 moles of F₂
1 moles of CH₄ = react with 5/2 moles of F₂
So, 0.610 moles of CH₄ = react with 0.610×5/2=1.525 moles of F₂
Given moles of F₂ = 0.760moles, which is less as compared to the calculated moles so for this reaction F₂ is the limiting reactant.
From the stoichiometry:
5 moles of F₂ = produce 2 moles of CF₄ & HF each
0.760 moles of F₂ = produce 2/5×0.760=0. 304moles of CF₄ & HF each
From the stoichiometry of the reaction, it is also clear that 0.. 304 moles of CF₄ & HF each require 0.176 moles of CH₄.
We know that the value of heat of formation of the below molecules is as:
CF₄ = -74.8kJ/mole
HF = -271.1 kJ/mole
CF₄ = -925.0 kJ/mole
F₂ = 0
Now we put all these values on the above equation with their respective moles, and we get
ΔH = (0.176 x -271.1 kJ/mole + 0.176 x -925 kJ/mole) - (0.176 x -74.8 kJ/mole) = - 389.95 kJ
Hence, - 385.89 kJ amount of heat is released.
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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.
Answers
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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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?
Answers
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.
what is the chemical reaction caused the by bath bombs in water?
How is density calculated? give an example and units
Answers
Density is a measure of the mass of a substance per unit volume. It is calculated by dividing the mass of the substance by its volume. For example, if you have a block of aluminum that has a mass of 40 grams and a volume of 10 cubic centimeters, the density of the aluminum block would be calculated as follows:
Density = mass / volume
= 40 grams / 10 cubic cm
= 4 g/cm^3
The unit for density is typically expressed in grams per cubic centimeter (g/cm^3) for solids and grams per milliliter (g/mL) for liquids.
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
Answers
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?
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
Answers
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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Identify the subshell in which electrons with the following quantum numbers are found: a. n = 3, l = 2 b. n = 1, l = 0 c. n = 4, l = 3 d. l = 3
Answers
Answer: a. n = 3, l = 2: The subshell in which electrons with these quantum numbers are found is the d subshell.
b. n = 1, l = 0: The subshell in which electrons with these quantum numbers are found is the s subshell.
c. n = 4, l = 3: The subshell in which electrons with these quantum numbers are found is the f subshell.
d. l = 3: It is not possible to determine the subshell in which electrons with this quantum number are found, as the principal quantum number "n" is not specified. The angular momentum quantum number "l" only specifies the shape of the orbital, not the energy level or subshell.
Explanation:
How many grams of barium hydroxide are required to react with 12.2 grams of caesium phosphate?
Answers
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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What is the pH of a 0.380 M solution of HNO₃?
Answers
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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In one to two sentences, explain how this reaction demonstrates that matter is neither created nor destroyed in a chemical reaction.
Answers
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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Which molecule has polar bonds? *
CF4
CI2
F2
H2
Answers
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
Hope this helps,
Hybridization was introduced to explain molecular structure when the valence bond theory failed to correctly predict them. It is experimentally observed that bond angles in organic compounds are close to 109°, 120°, or 180°. According to Valence Shell Electron Pair Repulsion (VSEPR) theory, electron pairs repel each other and the bonds and lone pairs around a central atom are generally separated by the largest possible angles.
Answers
According to VSEPR theory , bond angles in organic compounds are generally close to 109°, 120° or 180°.
Hybridization is defined as the mixing of two atomic orbitals which give rise to a new hybridized molecular orbital.
The hybrid orbitals so formed are different in energies and shapes. Equal energy atomic orbitals take part in hybridization. Since, valence bond theory failed to correctly predict the molecular structure, hybridization helps to understand the concept of bond formation, bond energies and bond lengths.
The shape of a molecule can be predicted from the electron pairs that surround the central atom by using Valence Shell Electron Pair repulsion (VSEPR) theory. This theory is based on the assumption that for a molecule to take a shape, its electronic repulsion should be minimized. That is why, according to experimental findings the angles between atoms of organic compounds are generally close to 109°, 120° or 180°.
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Which option correctly describes a model of methanol, CH₃OH ?
Answers
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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