Find the molecular mass of Ammonium dichromate and percentage composition of
oxygen and chromium in it.
Answers
Answered by
1
Answer:
Molar Masses of the Elements
Nitogen:
14.007 g/mol
Hydrogen:
1.00794 g/mol
Chromium:
51.9961 g/mol
Oxygen:
15.999 g/mol
Explanation:
therefore the molecular mass of the whole compound (NH4)2Cr2O7
(2×14.007) + (8×1.00794) + (2×51.9961) + (15.999)
⇒ 252.06 g/mol
The ratio of oxygen and chromium is 7:2
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Answered by
4
Answer:
(NH4)2Cr2O7
Molecular mass = (14)2+(1)8 + (52)2 + (16)7
=28+8+104+112
Molecular mass =252 g/mol
Percentage composition of oxygen = mass of oxygen / mass of ammonium dichromate × 100
=112/252×100
Percentage of oxygen = 44.44%
Percentage composition of chromium =104/252×100
Percentage of chromium =41.26%
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