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Convert into mole.
(a) 12 g of oxygen gas
(b) 20 g of water
(c) 22 g of carbon dioxide
Asked by Manisha Last Modified
Answer (a) 32 g of oxygen gas = 1 mole
Then, 12 g of oxygen gas =
= 0.375 mole
(b) 18 g of water = 1 mole
Then, 20 g of water =
= 1.11 moles (approx)
(c) 44 g of carbon dioxide = 1 mole
Then, 22 g of carbon dioxide =
= 0.5 mole
Answer :-
a)Given mass of oxygen gas = 12 g
Molar mass of oxygen gas ( O₂) = 2 x 16 = 32 g
No. of moles = given mass / molar mass = 12/32 = 0.375 moles
b) Given mass of water = 20 g
Molar mass of water (H₂O) = 2 x 1 + 16 = 18 g
No. of moles = given mass / molar mass = 20/18 = 1.11 moles
c) Given mass of carbon dioxide = 22 g
Molar mass of carbon dioxide (CO₂) = 12 + 2 x 16 = 44 g
No. of moles = given mass / molar mass = 22/44 = 0.5 moles
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