Question 11.11: How many liters of oxygen gas form when 294 g of KClO3 compl......
How many liters of oxygen gas form when 294 g of KClO_3 completely react in this reaction (which is used in the ignition of fireworks)?
2 KClO_3(s) → 2 KCl(s) + 3 O_2(g)Assume that the oxygen gas is collected at P = 755 mm Hg and T = 305 K.
Step-by-Step
GIVEN:
294 g KClO_3
P = 755 mm Hg (of oxygen gas)
T = 305 K
FIND: Volume of O_2 in liters
RELATIONSHIPS USED
1 mol KClO_3 = 122.6 g (molar mass of KClO_3)
2 mol KClO_3 : 3 mol O_2 (from balanced equation given in problem)
PV = nRT (ideal gas law, Section 11.8)
PV = nRT
V\,=\,\ \frac{n R T}{P} \\ P=755 \cancel{mm Hg} \times \frac{1 atm}{760 \cancel{mm Hg}}=0.99\underline{3}42 atm \\ V=\frac{3.60 \cancel{mol} \times 0.0821 \frac{L \cdot \cancel{atm}}{\cancel{mol} \cdot \cancel{K}} \times 305 \cancel{K}}{0.99\underline{3}42 \cancel{atm}}= 90.7 L
Related Answered Questions
Question: 11.15
Verified Answer:
GIVEN:
P_1 = 855 mm Hg
V_1[/...
Question: 11.16
Verified Answer:
GIVEN:
n = 1.2 mol
V = 28.2 L
T = 334 K
FIND: P
RE...
Question: 11.14
Verified Answer:
GIVEN:
P_1 = 3.2 atm
V_1[/la...
Question: 11.13
Verified Answer:
GIVEN: 18.4 in. Hg
FIND: torr
RELATIONSHIPS USED
1...
Question: 11.12
Verified Answer:
GIVEN:1.24 L H_2
FIND: g H_2...
Question: 11.8
Verified Answer:
GIVEN:
m = 0.311 g
V = 0.225 L
t = 55 °C
P = 886 m...
Question: 11.5
Verified Answer:
GIVEN:
V_1 = 4.8 L
n_1[/late...
Question: 11.7
Verified Answer:
GIVEN:
P = 24.2 psi
V = 3.2 L
t = 25 °C
FIND: n
RE...
Question: 11.6
Verified Answer:
GIVEN:
n = 0.845 mol
P = 1.37 atm
T = 315 K
FIND: ...
Question: 11.4
Verified Answer:
GIVEN:
P_1 = 735 mm Hg
t_1[/...