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Express the number 0.0000000540 in scien...

Express the number 0.0000000540 in scientific notation and calculate the number of significant figures.

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V PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-QUESTION BANK
  1. (a) How many signifficant figures are there in '1.00 xx 10^6' ? (c) Gi...

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

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

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

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  5. 4.62g of sugar and 2.935g of table salt were mixed with 28.2g of water...

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

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

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

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

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

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

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

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

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

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

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

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

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  18. Calculate the percentage composition of calcium nitrate (Ca(NO3)2).

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  19. 1.0 g of Mg is burnt in a closed vessel which contains 0.5 g of O2 . W...

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  20. A solution is prepared by dissolving 4 g of NaOH to give 500 ml of it....

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