Question

Calculate the numder of moles in the following 12g of O2,22g of CO2​

Answer 1

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Answer 2

Answer:

a)

Given mass = 12 g

Molar mass of oxygen gas ( O₂) = 2 x 16 = 32 g

No: of moles = given mass / molar mass

= 12/32 = 0.375 moles

b)

Given mass = 20 g

Molar mass of water (H₂O) = 2 x 1 + 16 = 18 g

No: of moles = given mass / molar mass

= 20/18 = 1.11 moles

c)

Given mass = 22 g

Molar mass of carbon dioxide (CO₂) = 12 + 2 x 16 = 44 g

No: of moles = given mass / molar mass

= 22/44 = 0.5 moles