For the following reaction, 10.5 grams of carbon monoxide are allowed to react with 9.46 grams of oxygen gas.
carbon monoxide(g) + osygen(g) ⟶ carbon dioxide(g)
What is the maximum mass of carbon dioxide that can be formed? _______ grams
1)
Molar mass of CO,
MM = 1*MM(C) + 1*MM(O)
= 1*12.01 + 1*16.0
= 28.01 g/mol
mass(CO)= 10.5 g
use:
number of mol of CO,
n = mass of CO/molar mass of CO
=(10.5 g)/(28.01 g/mol)
= 0.3749 mol
Molar mass of O2 = 32 g/mol
mass(O2)= 9.46 g
use:
number of mol of O2,
n = mass of O2/molar mass of O2
=(9.46 g)/(32 g/mol)
= 0.2956 mol
Balanced chemical equation is:
2 CO + O2 ---> 2 CO2
2 mol of CO reacts with 1 mol of O2
for 0.3749 mol of CO, 0.1874 mol of O2 is required
But we have 0.2956 mol of O2
so, CO is limiting reagent
we will use CO in further calculation
Molar mass of CO2,
MM = 1*MM(C) + 2*MM(O)
= 1*12.01 + 2*16.0
= 44.01 g/mol
According to balanced equation
mol of CO2 formed = (2/2)* moles of CO
= (2/2)*0.3749
= 0.3749 mol
use:
mass of CO2 = number of mol * molar mass
= 0.3749*44.01
= 16.5 g
Answer: 16.5 g
2)
CO is limiting reagent
Answer: CO
3)
According to balanced equation
mol of O2 reacted = (1/2)* moles of CO
= (1/2)*0.3749
= 0.1874 mol
mol of O2 remaining = mol initially present - mol reacted
mol of O2 remaining = 0.2956 - 0.1874
mol of O2 remaining = 0.1082 mol
Molar mass of O2 = 32 g/mol
use:
mass of O2,
m = number of mol * molar mass
= 0.1082 mol * 32 g/mol
= 3.462 g
Answer: 3.46 g
For the following reaction, 10.5 grams of carbon monoxide are allowed to react with 9.46 grams of oxygen gas.
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