The formula for oxalic acid is (COOH) 2. How many atoms does each molecule contain?...
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Transcript of The formula for oxalic acid is (COOH) 2. How many atoms does each molecule contain?...
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