When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of 56.5 g of oxygen, 18.1 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

Mass of carbon dioxide produced = 52.8 g

Explanation:

Given dа ta:

Mass of carbon react = 14.4 g

Mass of oxygen = 56.5 g

Mass of oxygen left = 18.1 g

Mass of carbon dioxide produced = ?

Solution:

C + O₂ → CO₂

Number of moles of C:

Number of moles = mass / molar mass

Number of moles = 14.4 g / 12 g/mol

Number of moles = 1.2 mol

18.1 g of oxygen left it means carbon is limiting reactant.

Now we will compare the moles of C with CO₂.

C : CO₂

1 : 1

1.2 : 1.2

Mass of CO₂:

Mass = number of moles * molar mass

Mass = 1.2 mol * 44 g/mol

Mass = 52.8 g