Question

Calculate the mole of (a) 12g of oxygen
(b)22g of carbon dioxide

Answer 1

Hey Mate ✌
Here is ur answer
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a). Molar mass of O = 16g
Given mass of O = 12g
No. Of mole = Given mass / molar mass
= 16/12. = 1.34 (approx.)

b). Molar mass of CO2 = Atomic mass of carbon + 2(Atomic mass of oxygen)
= 12 + 2 × 16
= 12 + 32
= 52g
Given mass = 22g
No. of mole = given mass / molar mass
= 52/22
= 2.37 (approx.)
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Hope it helps u
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Answer 2

a). 1.34
b). 2.47
Hope it helps