Which of the following has maximum mass?

0.1

gram atom of carbon

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0.1

mol of ammonia

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6.02 \times 10^{22}

molecules of hydrogen

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1120 c c

of carbon dioxide at STP

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Solution

The correct option is C $1120 c c$ of carbon dioxide at STP
0.1 g atom of $C =$ 0.1 mole $= 1.2$ g
0.1 mole of $N H_{3}$ =1.7g
$6.02 \times 10^{22}$ molecules of $H_{2}$ = 0.1 mole =0.1 g
1120 cc of $C O_{2}$ at STP = $\frac{1120}{22414}$ mole = 0.05 mole = 2.19 g
Therefore, 1120 cc of $C O_{2}$ at STP has maximum mass.

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Calculate the mass of
(i) 10²² atoms of sulphur,
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[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's Number = 6 × 10²³]

N_{2}

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2.12

= 106

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