We can change the freedom of movement in molecules of a substance by the addition or removal of heat.
What are molecules?Molecules are the smallest particles of a substance that are capable of independent existence and that still retain the properties of that substance.
The movement of the molecules of a substance is dependent on the strength of the force of attraction between the molecules of the substance.
The stronger the attractive forces between the molecules of a substance, the less free the molecules of the substance will be to move.
The molecules of a substance can acquire energy to overcome these attractive forces when heat is added to the substance.
Hence, an increase or decrease in the temperature of a substance will change the movement of the molecules of the substance.
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4 Determine the missing reactant for the following combustion reaction: 2 + 1502 →14CO2+ 6H₂O.
A C₁4H₁2
B C₁4H12O4
C C₂H6
D C-H₂O₂ 2
The correct reactant that matches the equation is c)C₇H₆.
The missing reactant for the combustion reaction is C₇H₆. The complete reaction would be
2C₇H₆ + 1502 →14CO2+ 6H₂O.
C7H6 is a hydrocarbon molecule. The name of this molecule is heptendiin
If heptendiin is heated in the presence of oxygen, it will undergo combustion to form carbon dioxide and water vapor. When heptendiin is burned in air, the products of combustion are carbon dioxide and water vapor.
The combustion of this compound is a exothermic reaction, meaning that it releases heat on burning to give out Carbon-di-oxide and Water.
When 2 moles of C₇H₆ reacts with 15 moles of Oxygen, it gives 14 moles of Carbon-di-oxide and 6moles of water molecule.
Therefore the missing reactant, that gives out water and carbon-di-oxide is C₇H₆. Hence, the correct option is c)
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What two processes decrease the motion of particles
According to the research, the correct answer is solidification and condensation. These processes that decrease the motion of particles.
What are solidification and condensation?Solidification refers to the state that can be produced by the compression of the matter in question or by a drop in temperature, decreasing the kinetic energy of the particles, favoring the appearance of cohesive forces between them.
In this sense, condensation is the process of transforming a gaseous body into a liquid, by decreasing the temperature, decreasing the energy contained in the gas particles, therefore their motion.
Therefore, we can conclude that solidification and condensation are processes that imply a decrease in temperature and therefore decreases the motion of particles by losing energy.
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Some natural and synthetic materials are made of long repeating units. What are these best referred to as?
O Links (left) and chains (right)
O Molecules (left) and macromolecules (right)
O Solutes (left) and solutions (right)
O Monomer (left) and polymer (right)
Long repeating units are used to create several natural and manmade materials. they most appropriately referred to as O Links and chains (left) and O Molecules (right)? (left).
What is the name for a long sequence of repeated units?A molecule comprised of repeating units is referred to as a polymer. These "monomers" combine to form a lengthy molecular chain. It could be made up of branches or it might just be one continuous line of identically related molecules.
Name the worker macromolecule in the cell and describe one of its functions.A polymer or macromolecule made of many amino acids, proteins are. The monomers/building blocks of a protein are amino acids. things? There are numerous varieties of proteins, which are the supporting molecules of the cell,
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If an element is bonded to 4 other atoms and has a formal charge of +1, what group must the element be in?
A) 5A
B) 6A
C) 7A
D) 3A
E) 4A
Considering the redox reaction Cr + Ni²+ → Cr³+ + Ni, how many
electrons are transferred in the balanced reaction?
In the redox reaction Cr + Ni²+ → Cr³+ + Ni, the electrons are transferred in the balanced reaction is 3 electrons.
In this given reaction,
Cr → Cr³+ + 3e-
Ni²+ + 2e- → Ni
+_____________
Cr + Ni²+ → Cr³+ + Ni
In the redox reaction, determine the lowest common multiple of the number of electrons gained in the reduction and lost in the oxidation. In redox reaction, a type of chemical reaction that involves a transfer of electrons between two species.
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why sodium is not stored in water but stored in kerosene oil?
Answer:
Because it is a highly reactive group 1 metal and would react with the water, but not with oil.
Arsenic is in the same family as this element that has a mass of 14.
Answer:
below
Explanation:
From periodic table:
Arsenic is a metalloid in the family with Silicon (Si) which has a mass of 14
One of the most harmful organic substance to nature is
a. DNA
b. RNA
c. Amino acid
d. CFC
one of the most harmful organic substance to nature is
d. CFC
One of the most harmful organic substance to nature is CFC. Chemicals with carbon, chlorine, and fluorine atoms are known as chlorofluorocarbons (CFCs) , and they are neither poisonous nor combustible.
What is CFC ?Chlorofluorocarbons and hydrochlorofluorocarbons are formed as volatile derivatives of methane, ethane, and propane. They are completely or partially halogenated hydrocarbons that include carbon, hydrogen, chlorine, and fluorine.
They are employed as solvents, refrigerants, blowing agents for foams and packaging materials, and in the production of aerosol sprays. Freon, a brand name owned by DuPont, is another name for them.
Chlorofluorocarbons (CFCs) are a class of artificially produced, odorless compounds. CFCs have been prohibited since 1996 due to the harm they do to the ozone layer of the earth. The biodiversity of the world itself will suffer if the ozone layer is destroyed.
Thus, option D is correct.
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The question is in picture below, help!
Answer: What are the answer choices?
Explanation: I need answer choices to see, there are a lot of definitions, verbs and nouns for an answer.
How would these questions be answered based on the pictures provided?
3) Consider the ideal gas equation, PV = nRT. Rearrange to solve for P (show your work below).
Recall that the equation of a line is y = mx + b. In that case, plotting y vs x gives you a slope
of m and an intercept of b. Now look at your equation that you solved for P. If you plot P vs
1/V, what should the slope be? What should the intercept be?
The slope of the line would be m = nRT.
How to prove this answer?
We know that the ideal gas law is PV = nRT.
We know that y = mx + b. In that case, plotting y vs x gives you a slope
of m and an intercept of b.
Here according to the question, If we send V to RHS,
P= (1/V) nRT Where y axis is P and 1/V is y axis, nRT would be the ultimate slope.
Howerver, intercept c ( y=mx+c) would be 0 as we considered ideal situation with temperature , R constant.
Therefore, Slope would be nRT.
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5. WHICH OF THE FOLLOWING IS NOT A COVALENT COMPOUND? *
A. CCl4
B. H2O
C. Al3O2
D. CO2
There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. The correct option is option C.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds. CCl[tex]_4[/tex], H[tex]_2[/tex]O, CO[tex]_2[/tex] are ionic compound. Al[tex]_2[/tex]O[tex]_3[/tex] is an ionic compound.
Therefore, the correct option is option C.
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which gaseous agent is a mixture of carbon and one or more elements from the halogen series (fluorine, chlorine, bromine, or iodine)?
Halon is a gaseous agent which contains a mixture of carbon and one or more elements from the halogen series.
Halons are from the group of halocarbons. Halons are substances made of bromine, fluorine, and carbon. Extinguishers and other firefighting apparatus use them. Halons are electrically nonconducting substances that can be used to put out fires in flammable liquids and most solid combustible materials, including those found in electrical equipment. They are ineffective against fires caused by fuels that contain their own oxidizing agent or by highly reactive metals like sodium or potassium.
Halon 1301, also known as bromotrifluoromethane, is particularly preferred for putting out fires involving electronic equipment because it leaves no residue, doesn't result in electrical short connections, and won't harm the device's corrosion.
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1. What does Heisenberg's principle of uncertainty state about the position and velocity of an electron
Neither can be measured with any level of certainty at the same time.
Only one can be measured with some level of certainty at a given time.
Both can be measured with a low level of certainty at the same time.
Both can be measured when a high level of certainty at the same time.
Answer:
Both can be measured with a low level of certainty at the same time.
it depends on what you count as low or high levels of uncertainty though.
Explanation:
The equation is something like:
[tex]\Delta x \Delta p \geq \frac{h}{4 \pi}[/tex]
delta x is the uncertainty (not change) of position, and delta p is the uncertainty of momentum. then term on the right is a constant (in this case, a very small number)
This equation tells us that neither the uncertainty of position nor the uncertainty of momentum can be zero, which means that there will always be some uncertainty. However, we can note that both of the uncertainties can be quite small at the same time, they just can't be smaller than h/4pi. This means that both can be measured with a fairly high level of certainty at the same time. However, there is a limit of how high the values can be, so i would expect that the answer your teacher is looking for is that both can be measured with a low level of certainty at the same time. This is always true, as opposed to saying that both can be measured when a high level of certainty at the same time, since high is quite subjective
10. How many grams of KOH are needed to make a 2.00 M solution?
Answer: The mass of KOH needed is 28 grams
Explanation:
Molarity: It is defined as the number of moles of solute present in one liter of solution.
In this question, the solute is KOH.
The formula used: M = N/V
wb = mass of solute KOH = ?
mb = molar mass of solute KOH = 56 g/mole
V = volume of solution = 250 ml
Molarity = 2.00 M = 2.00 mole/L
Now put all the given values in the above formula, and we get the mass of KOH.
Now put all the given values in the above formula, and we get the mass of KOH.
Therefore, the mass of KOH needed is 28 grams.
Answer: 28 grams
Explanation:
2molarity/L= Mass of KOH/ 56g/molarity multiplied by 250ml multiplied by 1000 *Hope it helped*
What is the concentration of sodium ions in 0.130 M Na₂HPO₄?
The concentration of sodium ions in 0.130 M Na₂HPO₄ is 0.26 M.
The Na₂HPO₄ will dissociates in to ions we get :
Na₂HPO₄ ----> 2Na⁺ + HPO₄⁻
here from the above equation it is clear that,the 1 moles of Na₂HPO₄ produce the 2 moles of Na⁺ and 1 mole of Na₂HPO₄ will produce 1 mole of HPO₄⁻.
the concentration of Na⁺ = ?
concentration of the Na⁺ = 2 × Na₂HPO₄
concentration of the Na⁺ = 2 × 0.130 M
the concentration of the Na⁺ = 0.26 M
Thus, The concentration of sodium ions in 0.130 M Na₂HPO₄ is 0.26 M.
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6. A. If 4.50 mols of ethane, C2H6, undergoes combustion according to the unbalanced equation
C2H6 + O2 ----------> CO2 + H2O
how many moles of oxygen are required?
B. How many moles of each product are formed?
Based on the mole ratio of the balanced equation of the reaction,
4.5 moles of ethane will require 15.75 moles of oxygenMoles of carbon (iv) oxide, CO₂, produced is 9 molesMoles of water, H₂O, produced is 13.5 molesWhat is the mole ratio of the reaction?The mole ratio of the reaction is obtained from the balanced equation of the reaction as follows:
Balanced equation of reaction: 2 C₂H₆ + 7 O₂ ------> 4 CO₂ + 6 H₂O
From the balanced equation of the reaction, the mole ratio of the reaction shows that 2 moles of ethane, C₂H₆, undergo combustion with 7 moles of oxygen, O₂, to produce 4 moles of carbon (iv) oxide, CO₂, and 6 moles of water, H₂O.
Hence;
4.5 moles of ethane will require 4.5 * 7/2 moles of oxygen
moles of oxygen required = 15.75 moles of oxygen
Moles of carbon (iv) oxide, CO₂, produced = 4.5 * 4/2
Moles of carbon (iv) oxide, CO₂, produced = 9 moles
Moles of water, H₂O, produced = 4.5 * 6/2
Moles of water, H₂O, produced = 13.5 moles
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PLEASE HELP ASAP DUE TOMMOROW! (35 POINTS)
Were you able to correctly identify all of the minerals on the first try? Which identification test did you enjoy most? Why? Which identification test did you think was least helpful for identification? Why?
( 1 or more paragraphs please)
Answer:
1 yes becuase I had studied most of the minerals in my free time. I enjoyed the 2nd one the most becuase of the fact that is had material that I was fond of not to mention I was very enthusiastic about answering the questions.i didn't like the 1st one that much becuase I didn't really understand it I feel like we should have briefed on it more before testing.
Explanation:
yw
Three moles of helium gas have a volume of 15.0 L. When heated to 30.0 °C at constant pressure, it has a volume of 40.0 L. Determine its initial temperature.
The initial temperature of the helium gas at a constant pressure is 113.63K.
How to calculate temperature?The temperature of an ideal gas can be calculated using the Charles law equation as follows;
V₁/T₁ = V₂T₂
Where;
V₁ = initial volumeT₁ =initial temperature V₂ = final volumeT₂ = final temperatureAccording to this question, three moles of helium gas have a volume of 15.0 L. When heated to 30.0 °C at constant pressure, it has a volume of 40.0 L. The initial temperature cane be calculated as follows:
15/T = 40/303
40T = 4545
T = 113.63K
Therefore, 113.63K is the initial temperature of the helium gas.
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Explain your understanding: Use your own words and captured images from the simulation to show you can:
i. Define “isotope” using mass number, atomic number, and neutrons
Please please please help and harry
Isotopes have the same atomic number but a different atomic mass. Isotopes of an element carry a different number of neutrons.
What is an isotope?Isotopes can be described as atoms of an element that have the same atomic number but a different mass number. Isotopes of an element contain the same number of electrons and protons as the actual element. but the number of neutrons are different in their respective nucleus.
For example, the isotopes of oxygen element are oxygen-16, oxygen-17, and oxygen-18 they all have 8 electrons or protons. As the number of neutrons in oxygen increases by one, it forms a new isotope of oxygen.
As for the isotope, the number of electrons in the isotope of any element is the same. Therefore, isotopes of any element carry the same atomic number but a different mass number.
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Practical work
1. What is the mass of a solution of sulfuric acid with a mass fraction of it in the solution of 96%
spent on dissolving copper scrap weighing 12.8 g, which contained 0.5 parts by mass of copper?
2. What volume of ammonia can be obtained by treating ammonium chloride weighing 12 g with a solution
sodium hydroxide, which contains 8 g of it.
3. What is the practical yield of gas, if 4 liters of it were obtained by the thermal decomposition of potassium nitrate
weighing 40.4 g?
4. What is the practical yield of the sediment, if 6.5 g of it was filtered after
addition of 15 g of barium hydroxide solution with a mass fraction of 40% to orthophosphate acid
weighing 5 g.
5. How will the rate of the reaction that takes place in the gas phase change when it decreases
temperature by 30°C, if the temperature rate coefficient for this reaction is equal to 3.
6. The reaction of the decomposition of phosphorus pentachloride proceeds according to the equation:
PCl 5 (g) ↔ PCl 3 (g) + Сl 2 (g) – 92 kJ. How to change: a) temperature; b) pressure; in)
the concentration of reactants to shift the equilibrium of the reaction towards the decomposition of PCl 5 (to the right).
Answer:
What is the mole fraction of sulfuric acid in a solution containing 98% sulfuric by mass?
What is the mole fraction of H2SO4 in a 98% aqueous H2SO4 solution?
Here given..
98 % of H2SO4 that means 98 g of H2SO4 is there in 100 g of aq. H2SO4 solution.
So.
Mass of solute = 98 g
Mass of solvent = 2 g (as water is considered as universal solvent)
Molar mass of solute = 98 g
Molar mass of solvent = 18 g
No of moles of solute = 1 mole (no of moles = given mass / molar mass)
No of moles of solvent = 2/18 = 1/9 moles
And ,
We know formula for mole fraction is..
x( of solute) = Moles of solute/(moles of solute + moles of solvent)
x (of solute) = 1/(1+(1/9)) = 0.9
x (of solvent) = 1 - 0.9 = 0.1
Explanation:
it is just number 1
WHY is matter able to change states?
Answer:
mostly due to heat or any outside substance for example if u add radio waves to heat you can get plasma or if u melt ice u get water witch is a solid turning into liquid
In the chemical reaction, calcium carbonate (CaCO3) was heated to form two new substances: calclum
oxide (Cao) and carbon dioxide (CO₂).
CaCO3 → CaO + COz
A student heated 24.8 g of CaCO3. After the reaction, they measured 13.9 g of Cao.
What was the mass of the CO₂ gas that escaped during the reaction?
A.10.9 g
B. 38.7 g
C.1.78 g
D.24.8 g
Chemical species are broken down into more basic components in decomposition processes. Energy input is often required for decomposition reactions. The mass of the CO2 gas that escaped = 10.99 g.
What is a decomposition reaction?
Chemical species are broken down into more basic components in decomposition processes. Energy input is often required for decomposition reactions.
A decomposition reaction occurs when one reactant disintegrates into two or more products. The following general equation represents this: AB A + B. Both the decomposition of water into hydrogen and oxygen and the breakdown of hydrogen peroxide into water and oxygen are examples of decomposition reactions.
A decomposition reaction occurs when one reactant disintegrates into two or more products. It is represented by the all-inclusive formula AB A + B. A and B are the reaction products in this equation, while AB stands for the reactant that starts the reaction.
Molecular mass of CaO = 56.07 g
CO = 44.01 g
the mass of the CO2 gas that escaped = 13.9 x 44.01/ 56.07
= 10.99 g.
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why lilithium is nor stored in kerosene oil but wrapped with in peraffin wax
Answer:
because if put in kerosene oil it will float and react with air
Compare the radial distance of Aluminum through Chlorine.
The radial distance of Aluminum through Chlorine is 175pm and Aluminum is 184pm
The atomic radius of an element is half of the distance between the center of two atom of that element that are just touching each other and generally the atomic radius decreases across a period from left to right and increases down a given group and aluminum has the greater atomic radius than the chlorine and in the periodic table atomic radii decreases from left to right across a row and increases from top to bottom down a column and because of these two trends and the largest atom are found in the lower left corner of the periodic table and the smallest are found in the upper right corner
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An element is located in group 11 on the periodic table. Would this element be a metal, nonmetal, or metalloid?
The periodic table's metal group 11, which includes sodium, is where you may find this element.
What is metal?When newly prepared, polished, or shattered, a metal exhibits a shiny look and quite good electrical and thermal conductivity. Typically, metals are malleable and ductile. The metallic link formed by the atoms and molecules of a metal gives rise to these characteristics. Any of the many glossy, opaque, fusible, ductile materials that really are good conductors of heat and electricity, make cations by the loss of electrons, and produce basic oxides & hydroxides. in particular: one that belongs to a chemical substance as opposed to an alloy.
What are the examples of metal and its types?Lead, aluminum, copper, zinc, and brass are a few examples. According to the periodic table, metals can be categorized according to their atomic structure. Alkaline, transitional, or alkaline earth metals are several types of metal. Any of a group of materials known as metals that exhibit strong thermal and electrical conductivity as well as malleability, ductility, and high light reflection.
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Of the following, a 0.1 M aqueous solution of ________ will have the lowest freezing point
Answer:
2
Explanation:
How does alternate freezing and thawing of water cause weathering to occur?
A Water expands when it freezes and cracks rocks open Water expands when it freezes and cracks rocks open
B Thawing causes rock particles to move from place to place Thawing causes rock particles to move from place to place
C Freezing chemically alters the rock surfaces
Freezing leads to weathering because water expands when it freezes and cracks rocks open Water expands when it freezes and cracks rocks open
What is weathering?The term weathering has to do with the process of the breakdown of the rocks to give rise to the soil. Now there are are various ways in which the process of weathering could be able to take place. One of the ways that the process of weathering can take place is what we call physical weathering.
In the process of physical weathering, we are looking at some kind of physical pressure which would lead to the breakdown of the rock. This is what makes it different from the chemical and the mechanical forms of weathering.
Thus, the fact that water would expand when we freeze it would mount pressure on the rock and then cause it to weather and form soil.
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Using the same sample of gas ( P1 = 735 torr , T1 = 6 ∘C ), we wish to change the pressure to 7350 torr with no accompanying change in volume or amount of gas. What temperature T2 , in Celsius, is needed to reach this pressure?
Express your answer with the appropriate units.
The temperature T₂, in Celsius, that is needed to reach the pressure of 7350 torr is 2517 °C
How do I determine the temperature T₂?From the question given above, the following data were obtained:
Initial pressure (P₁) = 735 torr Initial temperature (T₁) = 6 °C = 6 + 273 = 279 KVolume = ConstantNew pressure (P₂) = 7350 torrNew temperature (T₂) =?Since the volume isconstant, we can determine the new temperature, T₂ as illustrated below:
P₁ / T₁ = P₂ / T₂
735 / 279 = 7350 / T₂
Cross multiply
735 × T₂ = 279 × 7350
Divide both side by 735
T₂ = (279 × 7350) / 735
T₂ = 2790 K
Subtract 273 to obtain answer in °C
T₂ = 2790 – 273 K
T₂ = 2517 °C
Thus, the temperature T₂ is 2517 °C
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4. In a binary power system the secondary fluid that turns into vapor to drive the turbine
has a
a. lower boiling point
b. higher boiling point
5. What does an Enhanced Geothermal System (EGS) increase the risk of?
In a binary power system the secondary fluid that turns into vapor to drive the turbine has a lower boiling point
Binary cycles power plant operate on water at lower temprature of about 225-360°F and binary cycles plant use the heat from hot water to boil a working fluid and usually an organic compound with low boiling point and the working fluid is vaporized in a heat exchanger and used to turn a turbine and heat from geothermal fluid causes the secondary fluid to flash to vapor and which then drives the turbines and subsequently the generator
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