A sample containing 85g of NH₃ is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:

70, 15

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15, 70

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56, 20

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71, 14

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Solution

The correct option is A
70, 15

Total mass of NH₃ = 85 g.

Mass ratio (N:H) =14:3

Mass of Nitrogen =
$\frac{Ratio of Nitrogen}{Total Ratio}$ x Total mass of NH₃
= $\frac{14}{17} \times 85 = 70 g$

Mass of Hydrogen = $\frac{3}{17} \times 85 = 15 g$

Total mass is also constant in accordance with law of conservation of mass (70 + 15 = 85 g)

The answer is 70, 15.

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A sample containing 85g of NH3 is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are:

A sample containing 85g of NH₃ is decomposed into Nitrogen and Hydrogen. The total amount of Nitrogen and Hydrogen present in 85g of the sample respectively are: