Which of the following quantities does not share the same molar mass as the others when rounded to the nearest whole number?
A) Al2(SO4)3
B) C12H22O11
C) C24H38O
D) Pb3(PO4)4
Question 2
For this chemical reaction at equilibrium:
N2 (g) + 3H2 (g) = 2NH3 (g)
which of the following statements is true of the reaction rate?
A) The forward rate is faster than the reverse rate.
B) The reverse rate is faster than the forward rate.
C) Both the forward and reverse rates are zero.
D) The forward and reverse rates are the same.
Question 3
When the equation below is balanced, the coefficient of sodium cyanide is:
NaCN + H2SO4 Na2SO4 + HCN
A) 1
B) 2
C) 3
D) 4
Question 4
The observation that 10 g of hydrogen gas always combines with 80 g of oxygen gas to form 90 g of water, even when there is more than 80 g of oxygen present in the reaction container, illustrates the Law of
A) Definite Proportions.
B) Multiple Proportions.
C) ideal gases.
D) excess reactants.
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