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LONGANSWER

Mole Concept
By Sakshi Goel | 22 May'20 | 565 Views

Long Answer

Problem:

4 g of hydrogen reacts with 20 g of oxygen to form water. What is the mass of water formed?


Solution:

2 H subscript 2 and O subscript 2 yields 2 H subscript 2 O
4 g    32 g    36 g
When 4 g of H2 reacts with 32 g of O2 gives 36 g of H2O.
Now present oxygen is 20 g
So, O2 will be the limiting reagent and H2O will be calculated from O2
32 g of O2 given = 36 g of H2O
20 g of O2 given = 36 over 32 cross times 20 = 22.5 g H2O


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