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QveST [7]
2 years ago
7

Which of the following is most likely an indication of a chemical change?

Chemistry
2 answers:
givi [52]2 years ago
6 0

Answer:

B.) A loud sound when a starter's pistol is fired at a race.

faust18 [17]2 years ago
4 0
B. A loud sound when a starters pistol is fired at a race
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The rate of evaporation decreases, or slows down

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Thermal energy naturally flows from _________ matter to _______ matter.
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Why would an increase in temperatures be detrimental to the tundra? Select all that apply.
ludmilkaskok [199]

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3 0
2 years ago
If 0.255 moles of AgNO₃ react with 0.155 moles of H₂SO₄ according to this UNBALANCED equation below, how many grams of Ag₂SO₄ co
Ber [7]

Answer: 6.162g of Ag2SO4 could be formed

Explanation:

Given;

0.255 moles of AgNO3

0.155 moles of H2SO4

Balanced equation will be given as;

2AgNO3(aq) + H2SO4(aq) -> Ag2SO4(s) + 2HNO3(aq)

Seeing that 2 moles of AgNO3 is required to react with 1 moles of H2SO4 to produce 1 mole of Ag2SO4,

Therefore the number of moles of Ag2SO4 produced is given by,

n(Ag2SO4) = 0.255 mol of AgNO3 ×

[0.155mol H2SO4 ÷ 2 mol AgNO3] x

[ 1 mol Ag2SO4 ÷ 1 mol H2SO4]

= 0.0198 mol of Ag2SO4.

mass = no of moles x molar mass

From literature, molar mass of Ag2SO4 = 311.799g/mol.

Thus,

Mass = 0.0198 x 311.799

= 6.162g

Therefore, 6.162g of Ag2SO4 could be formed

4 0
3 years ago
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