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Classify each of the following as pure s...

Classify each of the following as pure substance or mixture.
(a) Ethyl alcohol
(b) Oxygen
(c) Blood
(d) Carbon
(e) Steel
(f) Distilled water

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V PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-QUESTION BANK
  1. How many significant figures are there in each of the following number...

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  2. Is the law of constant composition true for all types of compounds? Ex...

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  3. Classify each of the following as pure substance or mixture. (a) Ethy...

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  4. (a) How many signifficant figures are there in '1.00 xx 10^6' ? (c) Gi...

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  5. Calculate the number of moles in each of the following. a. '11 g' of '...

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  6. Express the number 0.0000000540 in scientific notation and calculate t...

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  7. State the number of significant figures in the following nựmbers. i. ...

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  8. 4.62g of sugar and 2.935g of table salt were mixed with 28.2g of water...

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  9. What is the difference between 3.0 and 3.00 g ?

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  10. Express the following numbers to four significant figures. i. 5.60798...

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  11. Calculate the molecular mass of the following? i. C6H(12)O6 ii. HNO...

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  12. Boron' occurs in nature in the form of two isotopes '5^(11)B' and '5^(...

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  13. Calculate the number of atoms in: i. 0.25 mole àtoms of carbon ii. 0...

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  14. A fIask P contains 0.5 mole of oxygen gas. Another flask Q contains 0....

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  15. Calculate the number of moles of iron in a sample containing '1.0 xx 1...

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  16. Calculate the no. of moles of phosphorus in 92.9 g of phosphorus assum...

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  17. Calculate the volume at STP occupied by i. 14g of nitrogen

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  18. Calculate the volume of 34 g of 'NH3' at STP?

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  19. The molecular mass of benzene is 78 and its percentage composition is ...

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  20. A compound contains 4.07% hydrogen, 24.27% carbon and 71.65% chlorine....

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