Convert into moles. a) 12 g of O2 gas b) 20 g of water c) 22 g of c

1.	Convert into moles. a) 12 g of O2 gas b) 20 g of water c) 22 g of carbon dioxide
Answer» a) 12 g of O₂ gas : Molecular weight of O₂ is 32. ∴ Number of moles of 32 g of O₂ gas = 1 Number of moles of 12 g of O gas = \(\frac{12}{32}\) x 1 = 0.375 b) 20 g of water : Molecular weight of water (H₂O) is 18. Number of moles of 18 g of water = 1 Number of moles of 20 g of water = \(\frac{20}{18}\) x 1 = 1.11 c) 22 g of carbon dioxide : Molecular weight of carbon dioxide (CO₂ ) is 44. ∴ Number of moles of 44 g of CO₂ = 1 Number of moles of 22 g of CO₂ = \(\frac{22}{44}\) x 1 = \(\frac{1}{2}\)= 0.5

Convert into moles. a) 12 g of O2 gas b) 20 g of water c) 22 g of carbon dioxide

Answer»

a) 12 g of O₂ gas :

Molecular weight of O₂ is 32.

∴ Number of moles of 32 g of O₂ gas = 1

Number of moles of 12 g of O gas = \(\frac{12}{32}\) x 1 = 0.375

b) 20 g of water :

Molecular weight of water (H₂O) is 18.

Number of moles of 18 g of water = 1

Number of moles of 20 g of water = \(\frac{20}{18}\) x 1 = 1.11

c) 22 g of carbon dioxide :

Molecular weight of carbon dioxide (CO₂ ) is 44.

∴ Number of moles of 44 g of CO₂ = 1

Number of moles of 22 g of CO₂ = \(\frac{22}{44}\) x 1 = \(\frac{1}{2}\)= 0.5