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1. Which sample contains the fewest atoms?
a. 10 g of C
b. 10 g of Ne
c. 10 g of H
d. 10 g of O
ANSWER: b
2. Which of the following is not an ionic compound?
a. CaSO4
b. MgO
c. CH4
d. LiF
ANSWER: c
3. The Roman numerals in the reaction given represent the coefficients in the balanced chemical
equation. What are the values of the coefficients?
I Ni(ClO4)2 + II K2S III KClO4 + IV NiS
I II III IV
a. 2 1 1 2
b. 1 2 1 1
c. 1 1 2 1
d. 1 1 1 2
ANSWER: c
4. In the reaction given below, how many grams of C14H9Cl5 will be produced by the reaction of
25.0 g of each of the starting materials?
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