Question

9.Following samples are arranged in the ascending order of their number of moles of molecules. a) 12g hydrogen b) 18g water. c) 88g carbon dioxide. (Hint: Atomic masses C=12,H=1,O=16)​

Answer 1

Answer:

(a) Molecular weight of oxygen in grams = 32 g of oxygen= one mole of oxygen gas

Thus, 12 g of oxygen=

32

1

×12=0.375 moles

(b) Molecular weight of water (H

2

O) in grams= 2+ 16=18 g=one mole of water

Thus, 20 g of water=

18

1

×20=1.111 moles

(c) Molecular weight of carbon dioxide (CO

2

) in grams=12+2×16=44 g=one mole of carbon dioxide

Thus, 22 g of carbon dioxide =

44

1

×22=0.5 moles

Explanation:

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Answer 2

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