\( 4 \mathrm{gms} \). of hydrogen are ignited with \( 4 \mathrm{gms} \) of oxygen. \( \mathrm{P}...

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\( 4 \mathrm{gms} \). of hydrogen are ignited with \( 4 \mathrm{gms} \) of oxygen.
\( \mathrm{P} \)
The weight of water formed is:
W.
(A) \( 0.5 \mathrm{gm} \)
(B) \( 3.5 \mathrm{gm} \)
(C) \( 4.5 \mathrm{gm} \)
(D) \( 2.25 \mathrm{gm} \)
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