REGULAR QUIZZES - REGULAR TOPIC 7 Stoichiometry SET A

• REGULAR Quizzes - REGULAR TOPIC 7 Stoichiometry SET A.

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QUESTION 1. What mass of magnesium chloride must be weighed out in order to get a 0.200 mole sample?

(A) 19.0 g
(B) 47.5 g
(C) 190. g
(D) 95.0 g
(E) 5.00 g

QUESTION 2. If 12.35 g of copper(II) carbonate are reacted with 4.000 x 10-3 moles of HCl, to produce 0.06600 g of carbon dioxide .02700 g of water and some other mass of copper(II) chloride, which is the limiting reagent?

(A) Hydrochloric acid
(B) Copper(II) chloride
(C) Copper(II) carbonate
(D) Water
(E) Carbon dioxide

QUESTION 3. If 12.35 g of Copper (II) Carbonate are reacted with 4.000 x 10-3 moles of HCl, to produce 0.06600 g of carbon dioxide .02700 g of water and some other mass of copper(II) chloride, how many moles, and of which reagent, are left over after the reaction?

(A) 0.098 moles of Copper(II) carbonate
(B) 0.100 moles of Copper(II) carbonate
(C) 0.002 moles of HCl
(D) 0.004 moles of HCl
(E) None of the above

QUESTION 4. If 12.35 g of Copper (II) Carbonate are reacted with 4.000 x 10-3 moles of HCl, to produce 0.06600 g of carbon dioxide 0.02700 g of water and some other mass of copper(II) chloride, what is the % yield?

(A) 20 %
(B) 30 %
(C) 50 %
(D) 75 %
(E) 100 %

QUESTION 5. When the following chemical equation is balanced using the lowest possible integers, what is the total of the sum of the coefficients?

H3PO4 + Ba(OH)2 ==> Ba3(PO4)2 + H2O?

(A) 2
(B) 3
(C) 4
(D) 12
(E) None of the Above

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