Find the mass of 3-011-1026 molecules of NH3 in grams-

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Standard XI

Chemistry

Mole Concept

Find the mass...

Question

Find the mass of $3.011 \times 10^{26}$ molecules of $N H_{3}$ in grams.

8599.81 g

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8249.81 g

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8349.81 g

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8499.81 g

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Solution

The correct option is D $8499.81 g$
The molecular mass of $N H_{3} = (14 + 3 \times 1) u = 17 u$
So, mass of one molecule of $N H_{3} = 17 u$
Therefore, mass of $3.011 \times 10^{26}$ molecules of $N H_{3} = 17 \times 3.011 \times 10^{26}$
$= 17 \times 3.011 \times 10^{26} \times 1.66054 \times 10^{- 24} g$
$= 8499.81 g$

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Mole Concept

Standard XI Chemistry

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Find the mass of 3.011×1026 molecules of NH3 in grams.

The correct option is D 8499.81 gThe molecular mass of NH3=(14+3×1) u=17 u So, mass of one molecule of NH3=17 u Therefore, mass of 3.011×1026 molecules of NH3=17×3.011×1026 =17×3.011×1026×1.66054×10−24 g =8499.81 g

Find the mass of $3.011 \times 10^{26}$ molecules of $N H_{3}$ in grams.