i) Two elements P and Q …
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i) Two elements P and Q combine to form a compound, atomic mass of
P is 12 and Q is 16. Percentage of P in the compound is 27.3. What
will be the empirical formula of the compound?
ii) Calcium carbonate decomposes on heating to give calcium oxide and
carbon dioxide. How much volume of CO2 will be obtained by thermal
decomposition of 50g of CaCO3? [Ca=40, C=12, O=16]
Posted by Naresh Janaki Raman 4 years, 10 months ago
- 1 answers
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Gaurav Seth 4 years, 10 months ago
i.
A n s w e r
Element mass % = mass ( g ) / At. mass %
Integral ratio of both =
P 27.3 12.
Q 72.7 16
2.275 /4.5= 1 / 2
Therefore, the Empirical formula is PQ2
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