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Calculate the molar mass of ethyl alcoho...

Calculate the molar mass of ethyl alcohol `(C_(2)H_(5)OH)`.

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`"Molar mass of "C_(2)H_(5)OH= (2 xx "gram atomic mass of C") + (6 xx "gram atomic mass of H")+(1 xx "Atomic mass of O")`
`= (2xx 12g)+(6 xx 1g)+(1 xx 16g)=46g`
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DINESH PUBLICATION-ATOMS AND MOLECULES-VERY SHORT ANSWER QUESTIONS
  1. Avogardo's number represents how many particles?

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  2. Give an example of (i)a divalent anion (ii)a trivalent cation (iii) a ...

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  3. Calculate the molar mass of ethyl alcohol (C(2)H(5)OH).

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  4. If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the ma...

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  5. What is the valency of calcium in CaCO(3)?

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  6. What happens to an element A if its atom gains two electrons?

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  7. Why is a cation so named?

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  8. An element Z forms an oxide with formula Z,O3. What is its valency?

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  9. The valency of an element A is 4. Write the formula of its oxide.

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  10. An element X has valency 3 while the element Y has valency 2. Write th...

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  11. Formula of the carbonate of a metal M is M(2)CO(3). Write the fomula o...

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  12. What do you understand from the statement "relative atomic mass of sul...

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  13. Calculate the formula unit mass of CaCl(2).

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  14. Which of the following represents the correct chemical formula? (i) ...

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  15. Sample A contains one gram molecules of oxygen molecules and sample B ...

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  16. Gram molecular mass of ammonia (NH(3)) is 17 g Is it correct to regard...

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  17. Give one example each of polyatomic element and polyatomic ion

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  18. Name the element which is used as a reterence for the atomic masses of...

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  19. Four samples of water [H(2)O] are collected from different sources, Ea...

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  20. Identify the cations and anions in the following compounds: (a)CH(3)...

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