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Q.

A sample of NaHCO3(s) on heating undergoes 1.845 gm loss of mass. Approximate mass of NaHCO3 (in nearest integer) in gm is :

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answer is 5.

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Detailed Solution

When we heat the sample of NaHCO3, we get,

2NaHCO3ΔNa2CO3+H2O+CO2

Here, the mass of NaHCO3

1.84562×2×84=5g

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