Which of the following has the maximum mass?

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Question

(A) To find the maximum mass,we calculate the mass of each option:$A$) $1$ gram atom of $C$ = $1 	ext{ mole of } C = 12 \ g$.$B$) $0.5$ mole of $CH_4

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$1$ gram atom of $C$

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(A) To find the maximum mass,we calculate the mass of each option:$A$) $1$ gram atom of $C$ = $1 	ext{ mole of } C = 12 \ g$.$B$) $0.5$ mole of $CH_4 = 0.5 	imes (12 + 4 	imes 1) = 0.5 	imes 16 = 8 \ g$.$C$) $10 \ mL$ of water = $10 \ g$ (since density of water is $1 \ g/mL$).$D$) $3.011 	imes 10^{23}$ atoms of $O = \frac{3.011 	imes 10^{23}}{6.022 	imes 10^{23}} 	ext{ moles of } O = 0.5 	ext{ moles of } O = 0.5 	imes 16 = 8 \ g$.Comparing the masses: $12 \ g > 10 \ g > 8 \ g$.Therefore,$1$ gram atom of $C$ has the maximum mass.

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