A sample containing 85 gm of NH₃ is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm 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 gm.

Mass ratio=14:3

Mass of Nitrogen = $\frac{14}{17}$ x 85 = 70 gm.

Mass of Hydrogen = $\frac{3}{17}$ x 85 = 15 gm.

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

The answer is 70, 15.

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A sample containing 85 gm of NH3 is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm of the sample respectively are:

The correct option is A 70, 15 Total mass of NH3 = 85 gm. Mass ratio=14:3 Mass of Nitrogen = 1417 x 85 = 70 gm. Mass of Hydrogen = 317 x 85 = 15 gm. Total mass is also constant in accordance with law of conservation of mass (70 + 15 = 85 gm). The answer is 70, 15.

A sample containing 85 gm of NH₃ is decomposed into nitrogen and hydrogen. The total amount of nitrogen and hydrogen present in 85 gm of the sample respectively are:

The correct option is A
70, 15

Total mass of NH₃ = 85 gm.

Mass ratio=14:3

Mass of Nitrogen = $\frac{14}{17}$ x 85 = 70 gm.

Mass of Hydrogen = $\frac{3}{17}$ x 85 = 15 gm.

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

The answer is 70, 15.