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DINESH PUBLICATION-ATOMS AND MOLECULES-SHORT ANSWER
- List the elements present in (i) quic lime (ii) sodium hydrogen carbon...
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- Convert into moles: (i)20g of water (ii)20g of carbon dioxide
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- (a)How many moles are present in 11.5g of sodium? (b)The mass of an ...
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- (a) How many particles are represented by 0.25 mole of an element? (...
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- What is the number of molecules present in 1-5 mole of ammonia (NH(3))...
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- Write the chemical symbols of two elements (a) Which are formed from...
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- (a) Four samples of carbon dioxide (CO(2)) were prepared by using diff...
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- 10^(22) atoms of an element X are found to have a mass of 930 mg. Calc...
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- (a) If the valency of carbon is 4 and that of sulphur is 2, write the ...
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- Give the formulae of the compounds that will be formed from the follow...
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- Verify by calculation that: 4 moles of CO(2) and 6 moles of H(2)O do...
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- A sample of vitamin C is known to contain 2.58 xx 10^(24) oxygen atoms...
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- Calculate the total number of ions in 0.585g of sodium chloride.
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- A flask contains 4.4g of CO(2) gas. Calculate (b) How many moles of ...
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- Determine the molecules mass of: (i) NH(4)OH (ii) K(2)CO(3) CH(...
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- (i) What is avagadro Constant? (ii) Calculate the number of particle...
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- (a) An element X exhibits variable valencies 3 and 5. Write the formul...
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- (a) State the law of conservation of mass (b) What mass of silver ni...
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- (a) State the various postulates of Dalton's atomic theory of matter...
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- (a) Define Avogadro's number. Why is it also known as Avogadro's const...
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