Question

the total number of moles of carbon dioxide formed on thermal decomposition of 4 moles of lime stone is

Answer 1

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lead nitrate → Lead Oxide + Nitrogen Dioxide + oxygen

2Pb(NO3)2 → 2PbO + 4NO2 + O2

4 moles of Nitrogen Dioxide gas and 1 mole of oxygen gas are produced from decomposition of 2 moles of lead nitrate.

Therefore, total number of moles of colourless gas is 1.

Answer 2

1 mole of $CO_2$ carbon dioxide  is produced, on thermal decomposition of 4 moles of lime stone.

Explanation:

• The term limestone can be termed as ambiguous as it doesn't let us know what ingredient for elements it has in it.  
• So, the limestone it could be better described as calcium carbonate.
• So we need to see the decomposition reaction of calcium carbonate to find out the number of moles that one mole of limestone would produce.

                                       $CaCO_3 \rightarrow CaO +CO_2$

• So from the reaction it is clear that if there is 1 mole of limestone present then there will be 1 mole of $CO_2$ produced.

To know more:

Total number of moles of carbon dioxide formed on thermal decomposition of 4 moles of limestone is?

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