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Mandarinka [93]
3 years ago
11

Which of the following equations is balanced and follows the Law of Conservation of Mass?

Chemistry
1 answer:
Jet001 [13]3 years ago
7 0

Option B is a balanced equation and follows the Law of Conservation of Mass. This is because the number of atoms of each element on both sides are the same.

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Of the following reactions occurring at 25ºC, which one involves the greatest increase in entropy?H2(g) + Cl2(g) = 2 HCl(g)H2O(s
SVETLANKA909090 [29]

Answer: [tex]CO_2(s)\rightarrow CO_2(g)[/tex]

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

\Delta S is positive when randomness increases and \Delta S is negative when randomness decreases.

a) H_2(g)+Cl_2(g)\rightarrow 2HCl(g)

2 molesof gas are converting to 2 moles of another gas , thus \Delta S is zero.

b) H_2O(s)\rightarrow H_2O(l)

1 mole of solid is converting to 1 mole of liquid, the randomness increases and thus \Delta S is positive.

b) Pb^{2+}(aq)+2Cl^-(aq)\rightarrow PbCl_2(s)

2 moles of ions are converting to 1 mole of solid, the randomness decreases and thus \Delta S is negative

d) CO_2(s)\rightarrow CO_2(g)

1 mole of solid is converting to 1 mole of gas, the randomness increases drastically and thus \Delta S is highly positive.

3 0
3 years ago
What is an isotope? list the isotopes of hydrogen in order from lighter to heavier. which is the most common among them?
malfutka [58]
Isotopes= a group of atoms with the same no. of protons , but different no. of neutrons

Hydrogen isotopes

^1H\implies ^2H\implies ^3H

The name of the second isotope is deuterium and the name of the third isotope is tritium(radioactive).The most abundant isotope is ^1H
6 0
3 years ago
Explain why lithium fluoride is a solid at room temperature
SashulF [63]
Lithium fluoride is a solid at room temperature because it is a salt that is held together by ionic bonds. Lithium. fluoride has a giant ionic structure.
8 0
3 years ago
I need answers please!
lana [24]
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3 0
3 years ago
The reaction of 5.40 g of carbon with excess O2 yields 13.6 g of CO2. What is the percent yield of this reaction?
vazorg [7]
C + O2= CO2
n  =  \frac{m}{mw}
n =  \frac{5.4}{12}  \\ n  = 0.45 \: mol \: of \: carbon
n =  \frac{13.6}{12 + 16 \times 2} \\ n =  \frac{13.6}{44}  \\ n = 0.31 \: mol \: of \: carbon \: dioxide
CO2 is limit
5.4-3.72= 1.68 g of C is excess
5.4 g = 100%
3.72 g = x
x=68.9 %
4 0
3 years ago
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