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Question
Solid ammonium dichromate decomposes as :
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate calculate the mass of chromium (III) oxide formed at the same time.
Numerical
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Solution
252 g of ammonium dichromate gives 152 g of CrO3
63 g of ammonium dichromate gives `(63 xx 152)/252`
= 38 g
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