4 g of hydrogen is burnt with 4 g of oxygen. How many grams of water can be formed?

# of hydrogen is burnt with  of oxygen. How many grams of water can be formed?

1. A

$0.5$

2. B

$2.5$

3. C

$4.5$

4. D

8

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### Solution:

$2{H}_{2}+{O}_{2}⟶2{H}_{2}O$

$2$ moles of hydrogen reacts with mole of oxygen to give $2$ moles of water

Given  of hydrogen which is $=4/2=2$ moles that is react with  of oxygen to form  of water

Given that oxygen is also , so oxygen is the limiting agent

oxygen $=4/32=1/8$ moles

Water produced $=$ no. of moles of oxygen $x$ no. of moles of hydrogen $=1/8×2=1/4$ mole

of oxygen will produce  of water

Hence the correct option is (C).

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