2g of H2 and 16 g O2 are reacted together.what is limiting reagent .calculate mass of water formed .
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Correct option is
B
18.0 g
H
2
+
2
1
O
2
→H
2
O
1 mole of H
2
combines with a half mole of O
2
to form one mole of H
2
O.
The molecular weights of H
2
, O
2
and H
2
O are 2 g/mol, 32 g/mol and 18 g/mole respectively.
2 g (1 mole) of H
2
combines with 16 g (half mole) of O
2
to form 18 g (one mole) of H
2
O.
We have 16.0 H
2
is mixed with 16.0g O
2
Out of this, 2.0 H
2
will combine with 16.0g O
2
since oxygen mass is limited.
18 g (one mole) of H
2
O will be obtained.
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