whitten quiz ch02

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The formula for oxalic acid is (COOH)2. How many atoms does each molecule contain? 1. 2. 3. 4. 5. 6 4 8 10 520% 20% 20% 20% 20%

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What is the molecular formula for acetic acid?1. 2. 3. 4. 5. CH3COOH CH3COCH3 CH3CH2OH CH3CH2CO2H CH3CH2OCH2CH320% 20% 20% 20% 20%

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What is the formula for iron(III) oxide?1. 2. 3. 4. 5. FeO3 FeO2 Fe3O2 Fe2O3 Fe3O20% 20% 20% 20% 20%

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Choose the name-formula pair that does not correctly match.1. magnesium phosphate Mg3(PO4)2 2. ferrous sulfite FeSO3 3. silver carbonate AgCO3 4. potassium fluoride KF 5. cupric bromide CuBr220% 20% 20% 20% 20%

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If 6.653 g of calcium combines exactly with 26.53 g of bromine and 12.29 g of zinc combines exactly with 30.04 g of bromine, what is the mass ratio of one atom of calcium to one atom of zinc?

1. 2. 3. 4. 5.

1.68 0.613 0.541 1.85 0.133

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Calculate the number of atoms in 40.5 g of aluminum.1. 2. 3. 4. 5. 900 2.5 x 10-24 9.0 x 1023 6.6 x 1026 1.8 x 10-2120% 20% 20% 20% 20%

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What is the formula weight of Fe(NH4)2(SO4)26H2O?1. 2. 3. 4. 5. 392 amu 384 amu 412 amu 376 amu 436 amu20% 20% 20% 20% 20%

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How many atoms of hydrogen are there in 88 g of C6H6?1. 2. 3. 4. 5. 3.6 x 1023 6.8 x 1022 2.6 x 1023 4.1 x 1024 5.3 x 102320% 20% 20% 20% 20%

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How many hydrogen atoms are present in 7.50 g of (NH4)2Fe(SO4)26H2O? 1. 2. 3. 4. 5. 5.16 x 1022 2.30 x 1023 1.15 x 1022 4.65 x 1023 3.35 x 102420% 20% 20% 20% 20%

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Calculate the percent composition of FeSO4.1. 2. 3. 4. 5. %Fe = 27.9%, %S = 24.1, %O = 48.0% %Fe = 16.2% , %S = 27.9%, %O = 55.8% %Fe = 33.2% , S = 9.5% , %O = 57.2% %Fe = 36.8%, S = 21.1%, %O = 42.1% %Fe = 25.1%, %S = 21.6% , %O = 53.2%3 23 43 4 24 44 5 25 45 6 26 46 7 27 47 8 28 48 9 29 49 10 30 50 11 31 12 32

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What would be the empirical formula for a compound containing 33.36% calcium, 26.69% sulfur, and 39.95% oxygen? 1. 2. 3. 4. 5. CaSO4 CaSO2 CaSO CaSO3 Ca2S2O520% 20% 20% 20% 20%

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The complete combustion of a hydrocarbon produced 352 mg of CO2 and 216 mg of H2O. What is the simplest formula of this hydrocarbon?

1. 2. 3. 4. 5.

CH CH C2H3 CH3 C3H2

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The complete combustion of a hydrocarbon produced 26.4 g of CO2 and 5.40 g of H2O. Another experiment determined the molecular weight of this hydrocarbon to be approximately 52 g/mol. What is its molecular formula?

1. 2. 3. 4. 5.

C2H4 CH C4H4 C2H2 CH4

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What mass of lead is present in 5.05 kg of mendipite, PbCl22PbO?1. 2. 3. 4. 5. 2.89 kg 4.05 kg 5.05 kg 3.68 kg 4.33 kg20% 20% 20% 20% 20%

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What mass of fluorine is contained in 2.00 tons of cryolite that is 42.0% pure Na3A1F6? (No other compounds containing fluorine are present.)

1. 2. 3. 4. 5.

912 lb 832 lb 456 lb 304 lb 152 lb

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