Question

8. Convert into mole.
(a) 12 g of oxygen gas
(b) 20 g of water
(c) 22 g of carbon dioxide.​

Answer 1

1 mole =4g

12×4=48

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Answer 2

Explanation:

a.) We know,

16g of oxygen gas = 1 mole

therefore,1g of oxygen gas = 1/16 mole

thus, 12g of oxygen gas = (1/16)12 = 0.75 mole✓✓✓

b.) We know,

18g of water = 1 mole

therefore,1g of water = 1/18 mole

thus, 20g of water = (1/18)20 = 1.1 mole✓✓✓

c.) We know,

44g of CO2 = 1 mole

therefore,1g of CO2 = 1/44 mole

thus, 22g of CO2= (1/44)22 = 0.5 mole✓✓✓

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