Chemistry
WAEC 2002
What volume of hydrogen will be produced if 100cm
3 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
Correct Answer: Option B
Explanation
According to the equation 2NH3 → N3 + 3H2
2 x 22400cm3 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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