# The formula for oxalic acid is (COOH) 2 by tob11086

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

1.    6                                                 20% 20% 20% 20% 20%

2.    4
3.    8
4.    10
5.    5

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What is the molecular formula
for acetic acid?
1.    CH3COOH                                           20% 20% 20% 20% 20%

2.    CH3COCH3
3.    CH3CH2OH
4.    CH3CH2CO2H
5.    CH3CH2OCH2CH3

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What is the formula for iron(III)
oxide?
1.    FeO3                                              20% 20% 20% 20% 20%

2.    FeO2
3.    Fe3O2
4.    Fe2O3
5.    Fe3O

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Choose the name-formula pair
that does not correctly match.
1. magnesium phosphate                                 20% 20% 20% 20% 20%
Mg3(PO4)2
2. ferrous sulfite FeSO3
3. silver carbonate AgCO3
4. potassium fluoride KF
5. cupric bromide CuBr2

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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.    1.68                                              20% 20% 20% 20% 20%

2.    0.613
3.    0.541
4.    1.85
5.    0.133

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Calculate the number of atoms in
40.5 g of aluminum.
1.    900                                               20% 20% 20% 20% 20%

2.    2.5 x 10-24
3.    9.0 x 1023
4.    6.6 x 1026
5.    1.8 x 10-21

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What is the formula weight of
Fe(NH4)2(SO4)2•6H2O?
1.    392 amu                                           20% 20% 20% 20% 20%

2.    384 amu
3.    412 amu
4.    376 amu
5.    436 amu

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How many atoms of hydrogen
are there in 88 g of C6H6?
1.    3.6 x 1023                                        20% 20% 20% 20% 20%

2.    6.8 x 1022
3.    2.6 x 1023
4.    4.1 x 1024
5.    5.3 x 1023

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How many hydrogen atoms are present in
7.50 g of (NH4)2Fe(SO4)2•6H2O?

1.    5.16 x 1022                                       20% 20% 20% 20% 20%

2.    2.30 x 1023
3.    1.15 x 1022
4.    4.65 x 1023
5.    3.35 x 1024

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Calculate the percent
composition of FeSO4.
1.    %Fe = 27.9%, %S = 24.1,                           20% 20% 20% 20% 20%
%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%

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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.    CaSO4                                             20% 20% 20% 20% 20%

2.    CaSO2
3.    CaSO
4.    CaSO3
5.    Ca2S2O5

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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.    CH                                                20% 20% 20% 20% 20%

2.    CH
3.    C2H3
4.    CH3
5.    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.    C2H4                                              20% 20% 20% 20% 20%

2.    CH
3.    C4H4
4.    C2H2
5.    CH4

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What mass of lead is present in 5.05 kg
of mendipite, PbCl2•2PbO?

1.    2.89 kg                                           20% 20% 20% 20% 20%

2.    4.05 kg
3.    5.05 kg
4.    3.68 kg
5.    4.33 kg

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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.    912 lb                                            20% 20% 20% 20% 20%

2.    832 lb
3.    456 lb
4.    304 lb
5.    152 lb

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