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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, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 4 years, 4 months ago

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

0Thank You

ANSWER

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