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What is percentage composition....

What is percentage composition.

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Percentage composition of a compound refers of the amount various elements present per 100 parts by man of the substances.
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SUBHASH PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY -NUMERICAL PROBLEMS AND ANSWERS:
  1. What is percentage composition.

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  2. How many significant figures are there in each of the following number...

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  3. Express the following to four significant figures: (i) 6.45372, (ii) 4...

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  4. 10.0 g of CaCO(3) on heating game 4.4g of CO(2) and 5.6 g of CaO. Show...

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  5. Express the result of the following calculation to the appropriate num...

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  6. The mass of precious stones is at present in terms of carat Given that...

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  7. The graphite present in a pencil weighs is 140 mg. Calculate the numbe...

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  8. Calculate the percentage of the naturally occuring isotopes ""^(35)Cl ...

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  9. Convert 22.4 L into cubic metres.

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  10. Calculate the molar mass of water if it contains 50% heavy water (D(2)...

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  11. 60 cc of oxygen was added to 24 cc of carbon monoxide and the mixture ...

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  12. 200 cm^(3) of carbon monoxide is mixed with 200 cm^(3) of oxygen at ro...

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  13. Calculate the volume of oxygen required to burn completely a mixture o...

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  14. Calculate the mass of 50 cc of CO at STP (C=12, O=16)

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  15. Calculate the volumes at STP occupied by 6.023 xx 10^(23) molecules of...

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  16. Calculate the number of molecules in 1 kg of sodium chloride. [Na =23,...

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  17. Calculate the value of 1 a.m.u. in grams.

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  18. 0.48 g of a gas forms 100 cm^(3) of vapours at STP. Calculate the gram...

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  19. Calculate the number of moles in the following mass (a) 7.85 g Fe (ato...

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  20. Calculate the normality of oxalic acid solutions containing 0.895 g cr...

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  21. 25 cm^(3) of ferrous ammonium sulphate solution require 20 cm^(3) of 0...

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