mttcreviewtest2 - MTTC Chemistry Review Test 2...

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MTTC Chemistry Review Test 2: Stoichiometry Name MDL TIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A sample of CH 4 0 with a mass of 32.0 g contains molecules of CH40. A) 5.32 x 10 -23 B) 1.88 x 10 22 C) 6.02 x 10 23 D) 1.00 E) 32.0 2) What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% ° by mass? 3) How many sulfur dioxide molecules are there in 1.80 mol of sulfur dioxide? 4) What is the mass % of carbon in dimethylsulfoxide (C 2 H 6 S0)? 5) What mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? Mg (s) + 2H20 (l) Mg(OH) 2 (s) + H 2 (g) A) 0.0162 B) 0.204 C) 0.219 D) 0.0485 E) 0.102 6) There are ____ hydrogen atoms in 25 molecules of C4H4S2.
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