Question

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

  • atoms and molecules CBSE Class 9
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Answer

(a) 32 g of oxygen gas = 1 mole

Then, 12g of oxygen gas = 12/32 mole = 0.375 mole

(b) 18g of water = 1 mole

Then, 20 g of water = 20/18 mole = 1.11 moles (approx.)

(c) 44g of carbon dioxide = 1 mole

Then, 22g of carbon dioxide = 22/44 mole = 0.5 mole

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