Download - Whitten Quiz Ch02
The formula for oxalic acid is (COOH)2. How many atoms does each molecule contain?
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1. 6
2. 4
3. 8
4. 10
5. 5
What is the molecular formula for acetic acid?
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1. CH3COOH
2. CH3COCH3
3. CH3CH2OH
4. CH3CH2CO2H
5. CH3CH2OCH2CH3
What is the formula for iron(III) oxide?
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1. FeO3
2. FeO2
3. Fe3O2
4. Fe2O3
5. Fe3O
Choose the name-formula pair that does not correctly match.
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1. magnesium phosphate Mg3(PO4)2
2. ferrous sulfite FeSO3
3. silver carbonate AgCO3
4. potassium fluoride KF
5. cupric bromide CuBr2
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?
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1. 1.68
2. 0.613
3. 0.541
4. 1.85
5. 0.133
Calculate the number of atoms in 40.5 g of aluminum.
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1. 900
2. 2.5 x 10-24
3. 9.0 x 1023
4. 6.6 x 1026
5. 1.8 x 10-21
What is the formula weight of Fe(NH4)2(SO4)2•6H2O?
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1. 392 amu
2. 384 amu
3. 412 amu
4. 376 amu
5. 436 amu
How many atoms of hydrogen are there in 88 g of C6H6?
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1. 3.6 x 1023
2. 6.8 x 1022
3. 2.6 x 1023
4. 4.1 x 1024
5. 5.3 x 1023
How many hydrogen atoms are present in 7.50 g of (NH4)2Fe(SO4)2•6H2O?
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1. 5.16 x 1022
2. 2.30 x 1023
3. 1.15 x 1022
4. 4.65 x 1023
5. 3.35 x 1024
Calculate the percent composition of FeSO4.
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1. %Fe = 27.9%, %S = 24.1, %O = 48.0%
2. %Fe = 16.2% , %S = 27.9%, %O = 55.8%
3. %Fe = 33.2% , S = 9.5% , %O = 57.2%
4. %Fe = 36.8%, S = 21.1%, %O = 42.1%
5. %Fe = 25.1%, %S = 21.6% , %O = 53.2%
What would be the empirical formula for a compound containing 33.36% calcium, 26.69% sulfur, and 39.95% oxygen?
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1. CaSO4
2. CaSO2
3. CaSO
4. CaSO3
5. Ca2S2O5
The complete combustion of a hydrocarbon produced 352 mg of CO2 and 216 mg of H2O. What is the simplest formula of this hydrocarbon?
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1. CH
2. CH
3. C2H3
4. CH3
5. C3H2
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?
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1. C2H4
2. CH
3. C4H4
4. C2H2
5. CH4
What mass of lead is present in 5.05 kg of mendipite, PbCl2•2PbO?
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1. 2.89 kg
2. 4.05 kg
3. 5.05 kg
4. 3.68 kg
5. 4.33 kg
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.)
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1. 912 lb
2. 832 lb
3. 456 lb
4. 304 lb
5. 152 lb
