# How many water is obtained when 3 moles of H2 reacts with 1 mole of O2 ? Option 1) 1 Option 2) 2 Option 3) 3 Option 4) 4

P Prateek Shrivastava

As we have learnt,

Concept of limiting reagent and excess reagent -

The reactant which gets consumed and thus limits the amount of product formed is called the limiting reagent.

- wherein

CH4 (g) + 2O2 (g) → CO2 (g) + 2 H2O (g) ;

In this reaction, if 1 mole of methane and 1 mole of oxygen are taken then oxygen would be limiting reagent.

$2H_{2} + O_{2} \rightarrow 2H_{2}O$

Moles before reaction:       3           1               0

Moles after reaction:          1           0               2

$\therefore$ Moles of water obtained = 2

Option 1)

1

Option 2)

2

Option 3)

3

Option 4)

4

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