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Mole Concept and Avogadro's Number

If the valenc...

Question

If the valency of hydrogen is 1 and and the valency of carbonate is 2 then how HCO₃ is formed?

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Solution

HCO₃(^-) is the bicarbonate ion

there is no compound with this formula --HCO₃

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Q. The valency of hydrogen is 1 and valency of carbon is 4. What is the maximum number of hydrogen atoms required to attain the octet configuration by the carbon?

Q. _{If valency of silver is +2 and valency of nitrate is -1,then when they both reacts they form}AgNO3.Explain why?

a. Define valency and variable valency with examples.

b. If the valency of nitrogen is 3 and of hydrogen is 1. Write down the formula for ammonia?

Valency and oxidation number are different for an element. Valency of carbon is generally

4

, however, the oxidation state may be

- 4, - 2, 0, + 2, - 1

, etc. In the compounds containing carbon, hydrogen and oxygen, the oxidation number of carbon can be calculated as: Oxidation number of carbon

= \frac{2 n_{O} - n_{H}}{n_{C}}

n_{H}, n_{O}

n_{C}

are number of respective atoms.

In which of the following compounds, the valency of carbon is two?

Q. An element X forms a compound XH₃ with hydrogen. Another element Y forms a compound YX₂ with X. Given that the valency of hydrogen is 1, what are the valencies of X and Y?

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