Basic Concepts - 20


Chemistry Class 11
1. The mass number of each element reported in periodic table is average of all the isotopes of that element.


2. The analysis in which mass of element in a sample of compound is determined is called quantitative analysis.


3. In combustion analysis H2O vapouns and CO2 are absorbed in 50% KOH and Mg(ClO4)2 respectively.


4. % of oxygen can be obtained directly from combustion analysis.


5. % of carbon in combustion an analysis is determined by the formula % of C= Mass of Carbon/Mass of organic compound X 12.00/ 44.0 X 100


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