<u>Answer:</u>
<em>D. [H+] of the acetic acid solution is greater than that of the hydrocyanic acid solution.</em>
<u>Explanation:</u>

Initial 0.1M 0 0
Change -x +x +x
Equilibrium 0.1M-x +x +x


(-x is neglected) so we get

is the
concnetration of acetic acid

Initial 0.1M 0 0
Change -x +x +x
Equilibrium 0.1M-x +x +x


(-x is neglected) so we get

is the
concnetration of Hydrocyanic acid
Thus we see here, [H+] of the acetic acid solution
is greater than that of the hydrocyanic acid solution 
<u>Please note∶ </u>
To find
we use formula
The value of kw is 1.0×10^(-14)
The
is lesser in each solution
Answer:
a) 7.94 x 10²³ molecules, b) 5.62 g SO2, c) 1.97 L
Explanation:
a) We need to first convert Cu2S to moles. Since molar mass of Cu2S is 159.14 g/mol, 14.0 g = 0.0880 mol. Using molar ratios (3 mol O2/2 mol Cu2S, 0.0880 mol of Cu2S = 0.132 mol O2. Since 1 mol contains 6.02 x 10²³ molecules, 0.132 mol O2 = 7.94 x 10²² molecules O2.
b) Since the molar ratios of Cu2S to SO2 is 1:1, 0.0880 mol of Cu2S produces 0.0880 mol SO2. To convert mol to grams, we use the molar mass of SO2 (64.06 g/mol) to figure out that 0.0880 mol SO2 = 5.63 g SO2.
c) At STP, 1 mol occupies 22.4 liters. 0.0880 mol SO2 x 22.4 L/1 mol = 1.97 L
If you would like more tutoring in chemistry or other subjects for FREE, check out growthinyouth.org.
Answer:
A. the law of constant composition
Explanation:
The molecules in the container would have the same composition because they would have traded around atoms until an equilibrium was reached with every molecule having 1 Hydrogen and 1 Chlorine.