Download J. Muench Quiz #5 CHEM 099 1. Calculate the empirical formula for

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J. Muench
Quiz #5
CHEM 099
1. Calculate the empirical formula for a compound that contains:
a. 72.4 % Fe and 27.6% O.
b. 39.3% C, 8.2% H, and 52.5% O.
2. Balance each chemical reaction.
a. __Bi2S3 + __HCl
__BiCl3 + __H2S
b. __C5H8O2 + __O2
__CO2 + __H2O
3. Using the reaction: 2 C2H2 + 5 O2
4 CO2 + 2 H2O, fill in the mole amounts below.
Amount of C2H2
Amount of O2
Amount of CO2
Amount of H2O
0.400 moles
10.0 moles
0.0180 moles
4. What mass of Mg3N2 would be required to produce 0.452 grams of NH3? The balanced reaction
is: Mg3N2 + 6 H2O
3 Mg(OH)2 + 2 NH3.
J. Muench
5. Using the reaction: 2 Al + 3Cl2
2 AlCl3, fill in the table below.
Amount of Al
Amount of Cl2
1.00 moles
1.80 moles
15.0 moles
20.0 moles
0.0525 moles
0.0750 moles
Limiting?
Amount of AlCl3
6. For the balanced reaction below, when 35.0g of H3PO4 react with 50.0g of MgCO3, then what
mass of Mg3(PO4)2 is possible?
2 H3PO4 + 3 MgCO3
Mg3(PO4)2 + 3 CO2 + 3 H2O
7. (BONUS) Consider the following reaction where X represents the identity of an unknown metal.
2 XNO3 + CaCl2
2 XCl + Ca(NO3)2
If 30.8 grams of CaCl2 completely reacts producing 79.6 grams of XCl, then what is the identity
of X?
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