Question

Convert into mole 12g oxygen gas 22g carbon dioxide

Answer 1

1.molar mass of oxygen=16×2=32g
no. of mole in 12g of oxygen
=12÷32=0.375 mole.
2. molar mass of carbon dioxide=12+2×16=44
no. of mole in 22g of carbon dioxide
=22×44=0.5 mole.

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Answer 2

oxygen gas=O2
mass of O2= 12g
atomic mass of O is 16amu
molecular mass of O2 = 16×2
= 32g
moles =12×1/32
= 3/8
=0.375moles


CO2 molecular mass = 12+16×2
= 12+32
= 44g/mol


mass of CO2 =22g

moles = 22×1/44
= 1/2
= 0.5moles











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