Answer:
The light wave could be absorbed by the object, in which case its energy is converted to heat.
Explanation:
For the process 2SO2(g) O2(g) Right arrow. 2SO3(g), Delta. S = –187. 9 J/K and Delta. H = –198. 4 kJ at 297. 0 K are known. What is the entropy of this reaction? Use Delta. G = Delta. H – TDelta. S. –386. 3 J/K –198. 4 kJ/K –187. 9 J/K –139. 3 kJ.
[tex]\rm -187.9 \;J/K[/tex]entropy of the reaction.
Entropy is the amount of heat or temperature inaccessible for the system to work and convert the chemical or thermal energy into mechanical energy.
How to calculate the entropy?Given,
[tex]\rm \Delta S[/tex] = [tex]\rm -187.9 \;J/K[/tex][tex]\rm \Delta H[/tex] = -198.4 kJTemperature (T) = 297.0 KThe balanced reaction can be shown as,
[tex]\rm 2SO_{2}(g) + O_{2}(g) \rightarrow 2SO_{3}(g)[/tex]
The Gibbs free energy can be calculated as:
[tex]\rm \Delta G = \Delta H - \rm T\Delta S[/tex]
Here,[tex]\rm \Delta G[/tex] = gibbs free energy, [tex]\rm \Delta H[/tex] = change in enthalpy, T = temperature and [tex]\rm \Delta S[/tex] = change in entropy.
Substituting values in the equation:
[tex]\begin{aligned}\rm \Delta G &= -198400 \;\rm kJ -297 \times (-187.9\;\rm kJ/mol)\\\\\rm \Delta G &= -198400 + 55806.3\\\\\rm \Delta G &= - 142593.7 \;\rm kJ\end{aligned}[/tex]
Therefore, [tex]\rm -187.9 \;J/K[/tex] is the entropy [tex](\rm \Delta S)[/tex] of the reaction.
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How many moles of o2 will result from the decomposition of 5 mol of hydrogen peroxide?
So following this simple ratio, 4 moles of H2O2 will result in 2 moles of O2. For 1 mole of H2O2, it will yield to 0.5 moles of O2. Adding those up, 5 moles of H2O2 will yield to 2.5 moles of O2.
The mole concept is used here to determine the moles of oxygen produced from the decomposition of hydrogen peroxide. The moles of O₂ produced is 2.5.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles = Given mass / Molar mass
The balanced equation for the decomposition of H₂O₂ is given as:
2H₂O₂ → O₂ + 2H₂O
Here the number of 'H' and 'O' atoms are equal on both sides.
The moles of oxygen produced from 5 mol of hydrogen peroxide is:
5 mol H₂O₂ × 1 mol O₂ / 2 mol H₂O₂ = 2.5 moles O₂
Thus the number of moles of O₂ produced from 5 mol of H₂O₂ is 2.5.
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Data that is collected that is mostly numbers?
Answer:
statistics
Explanation:
statistics is the study of using numbers to express data
You have a sample of 75.6 g of C3Hg. How many moles of C3Hg are in the sample?
Answer:
0.3195 mole
Explanation:
Number of moles of C3Hg
= mass ÷ molar mass
= 75.6 g ÷ (12 + 12 + 12 + 200.6)
= 75.6 g ÷ 236.6
= 0.3195 mole
A chemical reaction in which bonds are broken is usually associated with ________. a chemical reaction in which bonds are broken is usually associated with ________. the consumption of energy forming a larger molecule a synthesis the release of energy
Answer:The answer to the question is the release of energy. The bonds that bind a molecules atom's act as a storage of energy. One way it is released is when those bonds are broken and it is released outward in every direction. This breakage results in smaller molecules and not the formation of a larger molecule.
Explanation:
A student prepares 150. 0 mL of 1. 40 M HCl using 35. 0 mL of a stock solution. What is the concentration of the stock solution? Use M subscript i V subscript i equals M subscript f V subscript f. 0. 327 M 4. 29 M 6. 00 M 7. 35 M.
6.00 M is the concentration of the stock solution.
Molarity or the molar concentration is the measure of the chemical species amount of solute in the solvent or the solution. The molarity of the solute is given by the moles and the volume in which it is dissolved.
How to calculate the concentration of the stock solution?Given,
The molar concentration of [tex]\rm HCl[/tex] [tex](\rm M_{1})[/tex] = 1.40 MThe volume of hydrochloric acid [tex](\rm V_{1})[/tex] = 150.0 mLThe molar concentration of stock solution = ?The volume of stock solution [tex](\rm V_{2})[/tex] = 35.0 mLThe molarity can be estimated by:
[tex]\rm M_{1}V_{1} = M_{2}V_{2}[/tex]
Substituting values in the formula:
[tex]\begin{aligned}1.40 \;\rm M \times 150.0 \;\rm mL &= \;\rm M_{2} \times 35.0 \;\rm mL\\\\\rm M_{2} &= \dfrac{210}{35}\\\\&= 6 \;\rm M\end{aligned}[/tex]
Therefore, 6.00 M is the concentration of the stock solution.
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What type of chemical bond can form between an atom with 11 protons and an atom with 17 protons?.
Distinguish between a electrolytic cell and voltaic(Daniel) cell.
Answer:
are cell which contain sulfuric acid while voltaic are cell which are dry.
Of the following, which constitutes the greatest percent of domestic use of water in the united states?.
Answer:
The answer is Flushing toilets.
How many moles of carbon dioxide are produced from the reaction of oxygen with four moles of propane (C3H8)? C3H8 + 502 —> 3CO2 + 4H2O
Answer:
12 moles
Explanation:
1. Do comparison
From the equation, 1 mole of C3H8 yields 3 moles of CO2
Therefore, 4 moles of C3H8 should yield 12 moles of CO2
Steps:
Number of moles of CO2
= (1 mol x 4) x 3
= 12 moles
What is the range of accuracy for food temperature?.
Answer:
+ 2 degrees Fahrenheit
Explanation:
define malleable pls!
Answer:
The property of metal is that a piece of metal can be changed into a sheet by beating.
OR
The capable of being shaped or changed, whether physically or mentally is called malleable.
Explanation:
the lewis dot structure rule states that S=N-A. recall that A represents the TOTAL number of valence electrons available from all the atoms in molecule. what is A from silicon tetrachloride, SiCL4
Answer: oh i thought i knew it nvm im sorry love
Explanation:
A, the total number of valence electron is 24 for Silicon Tetrachloride , SiCl₄ .
What is Lewis Dot Structure ?In Lewis Dot structure S=N-A is used to calculate the total number of shared and unshared electrons in a molecule.
S is the number of shared electrons ,N is the number of total valence shell electrons required by all the atom of the molecule, A is the total number of valence electrons available from all the atoms in the molecule
For SiCl₄,
• We have to first count the valence electron on each atom that is coming to form a molecule .
Valence electron on Si = 4
Valence Electron on Cl = 7
Total valence electron on SiCl₄ = 4+ 4 * 7 = 32
• Then we find the least electronegative atom in the molecule and place it at the center , In SiCl₄ , Si has 1.8 and Cl has 3.16 and so Si is placed at the center and four Cl atoms are connected with a single bond
• A single bond takes up 2 valence electron and so for four bonds 8 valence electrons have been occupied , so we are left with 32-8=24 valence electrons.
Therefore In the Lewis Dot structure S=N-A , Total number of valence electrons available from all the atoms in molecule of SiCl₄ is 24.
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what is the valency of water
Answer:
In the water molecule oxygen combines with two hydrogens and so has a valency of 2. A simple diagram of a water molecule makes this plain. The hydrogen atoms are each sharing one pair of electrons - they have a valency of 1. The oxygen atom is sharing two pairs of electrons - it has a valency of 2.
Suppose you were given a substance and asked to determine whether it was a plasma. What characteristics would be true of the substance for it to be a plasma? Check all that apply.
Answer:
plasma flows but is a solid
Explanation:
example toothpaste flows but is a solid
What is water's density at 91 ∘c? assume a constant coefficient of volume expansion.
Answer:
982.5 kg/m³
Explanation:
When the temperature of a fluid increases, it dilates, and because of the variation of the volume, it's density will vary too. The density can be calculated by the expression:
ρ₁ = ρ₀/(1 + β*(t₁ - t₀))
Where ρ₁ is the final density, ρ₀ the initial density, β is the constant coefficient of volume expansion, t₁ the final temperature, and t₀ the initial temperature.
At t₀ = 4°C, the water desity is ρ₀ = 1,000 kg/m³. The value of the constant for water is β = 0.0002 m³/m³ °C, so, for t₁ = 93°C
ρ₁ = 1,000/(1 + 0.0002*(93 - 4))
ρ₁ = 1,000/(1+ 0.0178)
ρ₁ = 982.5 kg/m³
When a protein folds in the cytoplasm, what class of amino acids tends to be found in the interior core of the protein?.
Answer:
non-polar amino acid side chains Explanation: It is not very easy for me what about you???
What are the important processes in the water cycle?
The transfer of heat by mass motion in liquid and gas is referred to as convection |true or false?|
Answer:
True
Explanation:
Hope This Helps
Concert 15 cm3 to liters
The answer to your problem is 0.015 liters. I got the answer because to convert cubic centimeters into liters, you need to divide the cubic centimeters by 1000.
Ola has a solution of pH 9. Should he add acid or alkali to neutralise the solution
Answer:
acid
Explanation:
7 is neutral if more than 7 add acid if less than 7 add alkali
What is the number of moles in 3.2x10^24 atoms of nitrogen?
A. 1.9 moles
B. 5.3 moles
C.9.5 moles
D. 19.2 moles
Answer:
Option B
Explanation:
Use Avogadro constant of 6.02 x 10^23
For Option A,
1.9 moles x (6.02 x 10^23) = 1.1438 x 10^24
For Option B,
5.3 moles x (6.02 x 10^23) = 3.1906 x 10^24
For Option C,
9.5 moles x (6.02 x 10^23) = 5.719 x 10^24
For Option D,
19.2 moles x (6.02 x 10^23) = 1.1558 x 10^25
Therefore, the nearest one to 3.2 x 10^24 is Option B
A water molecule's shape resembles which of the following?
A)an oval
B)a circle
C)a square
D)a triangle
Answer:
the answer is D
Explanation:
i hope it's rite.
What is waste good for?
energy for decomposers
being stinky
food chain
Which term is defined as the fundamental particles of protons and neutrons?.
Can you please describe 3 ways that are used to help eliminate a deception
Answer:
Explanation:
A story of self-deception, a story about deceiving others, and a story about accidental deception.
Your teacher gives you a sample of an unknown element which is sealed in a glass tube at room temperature. At the bottom of the tube there is a small amount, a few drops at the most, of a red-black filmy liquid, and above it is a red vapor. What is this element likely to be?.
The element is likely to be metal.
The substances that are pure and only consists of atoms are called elements. They are the smallest and the fundamental unit of the compound and cannot be split to form any entity.
What are metals?The metals are the elements that are good conductors of charge, electricity, are opaque, malleable, lustrous and ductile. They have high density and melting points. They differ from the non-metals and metalloids based on their physical and chemical properties.
The metals are more likely to donate and gain electrons to form complexes and can produce transitions. The electron gets excited when the energy is given in the form of heat and electricity and thus when comes to the ground state gives a distinct colouration.
Therefore, the element is likely to be metal.
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Which has a higher vapor pressure hexane or nonane.
products formed when a candle burns
Answer:
Water vapor, carbon dioxide gas, heat, and light
Explanation:
I think this is right? :)
MY COMPUTER JUST FROZE SO I HAVE NO IDEA IF IM TYPING THE ANSWER
Explanation:
I THINK THE ANSWER WOULD BE OXYGEN AND LIGHT WOULD BE FORMED OFF OF THE CANDLE
Digits in a numerical value that are not placeholders
Leading zero is a digit in a numerical value that are not placeholders. Digits, which comprise 0, 1, 2, 3, 4, 5, 6, 7, 8, as well as 9, are employed to represent numbers.
What are numbers?An arithmetic value was using to represent a quantity and to do computations is known as a number. We use numbers to count things. For instance, in the image below, there are four butterflies and one butterfly.
An element's collection of no items is represented by the symbol "0," and we refer to it as zero. Digits, which comprise 0, 1, 2, 3, 4, 5, 6, 7, 8, as well as 9, are employed to represent numbers. We utilize a set of digits known called numerals to represent numbers. Leading zero is a digit in a numerical value that are not placeholders.
Therefore, leading zero is a digit in a numerical value that are not placeholders.
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