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Question
Complete combustion of $$0.858 g$$ of compound $$X$$ gives $$2.63 g$$ of $$\mathrm { CO } _ { 2 }$$ and $$1.28 \mathrm { g }$$ of $$\mathrm { H } _ { 2 } \mathrm { O }$$ . The lowest molecular mass $$X$$ can have:
A
$$129 g$$
B
$$172 g$$
C
$$83 g$$
D
$$43 g$$
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Solution
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Correct option is B. $$43 g$$
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