Question

Convert into mole

20 g of water

NCERT Class IX
Sciences - Main Course Book

Chapter 3. Atoms and Molecules

Answer 1

Molar mass of H = 1 
Molar mass of O = 16 
Molar mass of C = 12 


Molar mass of Water = H20 = 2*1+16 = 18 g/mol 
So, 1 mole of water weighs = 18 g 
which implies, 18g of water = 1 mole 
THerefore, 20g of water = 20/18 = 1.11 mole 

Answer 2

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