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Question

Which among the following is the heaviest?


A
One mole of oxygen
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B
One molecular of sulphur trioxide
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C
100 amu of uranium
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D
44 g of carbon dioxide
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Solution

The correct option is B $$44\ g$$ of carbon dioxide
$$1$$ mole of oxygen $$=1\times 16=16g$$
$$1$$ molecule of $${ SO }_{ 3 }$$ $$\left( 32+48 \right) =80\times 6\times { 10 }^{ -23 }g$$
$$100$$ amu of $$U\left[ 92g=1mol \right] $$
                                 $$=100\times 1.66\times { 10 }^{ -24 }g$$
$$44g$$ of $${ CO }_{ 2 }=1mol=44g$$
$$\rightarrow $$ Hence $$44g$$ of $${ CO }_{ 2 }$$ is the heaviest among these.

Chemistry

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