What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at...

WAEC 2002

What volume of hydrogen will be produced if 100cm³ of ammonia is completely decomposed at constant temperature and pressure? The equation for reaction is 2NH_3(g) → N_2(g) + 3H_2(g)

A. 50cm³
B. 150cm³
C. 200cm³
D. 300cm³

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Correct Answer: Option B

Explanation

According to the equation 2NH₃ → N₃ + 3H₂
2 x 22400cm^{3^{of ammonia will produce

3 x 22400cm³ of hydrogen

If 100cm³ of NH₃ is used.

:. H₂ volume = \(\frac{100}{2x22400} x 3x22400

=150cm₃}}

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