What mass of CO was used up in the reaction with an excess of oxygen gas if 24.7g of carbon dioxide is formed? 2 CO + O2 > 2 CO2

Balance Chemical Equation,

2 CO + O₂ → 2CO₂

Acc. to this reaction,

88 g (2 mole) of CO₂ was produced when = 56 g (2 mole) of CO was reacted

So,

24.7 g of CO₂ will be produced by reacting = X g of CO

Solving for X,

X = (56 g * 24.7 g) : 88 g

X = 2.26 g : 88 g

X = 0.0257 g of CO

Result:

0.0257 g of CO is required to be reacted with excess of O₂ to produce 24.7 g of CO₂.