REGULAR QUIZZES - REGULAR TOPIC 7 Stoichiometry SET C
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QUESTION 1. Consider the reaction below. How many moles of FeS2 will react with 6.00 moles of oxygen?

4FeS2 + 11O2 ==> 2Fe2O3 + 8SO2


(A) 6.00
(B) 11.0
(C) 2.18
(D) 2.75
(E) 0.545

QUESTION 2. What is the empirical formula of an oxide that is 71.43 % calcium?

(A) CaO
(B) Ca2O
(C) CaO2
(D) Ca2O2O
(E) None of the Above

QUESTION 3. What would be the expected final mass when 5.6600 g of copper(II) sulfate pentahydrate is heated to a constant mass?

(A) 3.6224 g
(B) 2.0376 g
(C) 0.11320 g
(D) 0.022640 g
(E) None of the Above

QUESTION 4. What is the average mass of two atoms of carbon?

(A) 12.01 g
(B) 24.02 g
(C) 6.02 x 1023 grams
(D) 6.02 x 1023 amus
(E) None of the Above

QUESTION 5. What is the average mass of one atom of sulfur?

(A) 6.02 x 1023 g
(B) 32.0 g
(C) 5.32 x 10-23 g
(D) 1.93 x 1025 g
(E) None of the Above




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