Chemistry: Supplemental Stoichiometry Problems Page 4
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1
2
3
4 10 CO
10. What quantity of energy is released when
2 C
H
+ 15 O
+ 10 H
O + 6,199 kJ
5
10
2
2
2
540 g of cyclopentane are burned?
8 FeS
11A. What mass of iron is needed to react with 16.0 grams of sulfur?
8 Fe + S
8
11B. How many grams of iron(II) sulfide are produced?
12. A chemical company must produce 650 L of hydrogen at STP.
Mg(NO
The company has done this reaction many times before,
Mg + 2 HNO
)
+ H
3
3
2
2
and the percent yield is always about 84%. What mass of each
reactant must they use in order to ensure that they produce 650 L of hydrogen?
2 NaCl + 3 O
13A. What volume of oxygen at STP is produced from 19.4 moles of sodium chlorate?
2 NaClO
3
2
13B. How many molecules of oxygen are produced when 80.0 grams of sodium chloride are produced?
Cu(NO
14A. How many moles of copper react with 3.50 moles of silver nitrate?
Cu + 2 AgNO
)
+ 2 Ag
3
3
2
14B. If 89.5 grams of silver were produced, how many grams of copper reacted?
6 CO
15. What quantity of heat is produced if 32 g of cyclohexane
C
H
+ 9 O
+ 6 H
O + 3,690 kJ
6
12
2
2
2
react with 95 L of oxygen at STP?
4
ANSWERS:
10. 2.4 x 10
kJ
12. 840 g Mg, 4400 g HNO
14A.
1.75 mol Cu
3
11A. 27.8 g Fe
13A. 652 L O
14B.
26.3 g Cu
2
24
m’c O
11B. 43.8 g FeS
13B. 1.23 x 10
15. 1400 kJ
2
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