If the mass of proton is doubled and that of neutron \( \mathrm{P} ...

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If the mass of proton is doubled and that of neutron
\( \mathrm{P} \) is halved, the molecular weight of \( \mathrm{CO}_{2} \), consisting

W only \( \mathrm{C}^{12} \) and \( \mathrm{O}^{16} \) atoms, will
(A) not change
(B) increases by \( 25 \% \)
(C) decrease by \( 25 \% \)
(D) increase by \( 50 \% \)
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