Stoichiometry

1
Stoichiometry
2
How many moles of ammonium sulfate can be made
from the synthesis reaction of 30.0 mol of
ammonia, NH3, with sulfuric acid, H2SO4? 2 NH3
H2SO4 ? (NH4)2SO4

1. 15.0
2. 30.0
3. 60.0
4. 1710
5. 3420

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3
In a very violent reaction called a thermite
reaction, aluminum metal reacts with iron(III)
oxide to form iron metal and aluminum oxide.
What mass of aluminum is needed to react with 150
g of iron(III) oxide? 2 Al Fe2O3 ? 2 Fe Al2O3

1. 1.88 g
2. 25.3 g
3. 50.7 g
4. 101 g
5. 150 g

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4
Hydrogen and nitrogen gases can be combined to
form ammonia gas, NH3. How many moles of N2 are
required to form 27.0 g of ammonia? 3 H2 N2 ?
2 NH3

1. 0.79 mol
2. 1.59 mol
3. 3.17 mol
4. 44.4 mol
5. 88.8 mol

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5
Sodium sulfide and cadmium(II) nitrate undergo a
double replacement reaction. What is the mass of
cadmium sulfide that can be produced from 5.00 g
of sodium sulfide? Na2S Cd(NO3)2 ? 2 NaNO3
CdS

1. 0.34 g
2. 0.64 g
3. 4.69 g
4. 9.38 g
5. 18.8 g

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