Calculate the number of moles in 1.51 × 1023 molecules of NH4Cl.

Calculate the number of moles in 1.51 × 10²³ molecules of NH₄Cl.

Sum

1.51 × 10²³ molecules of NH₄Cl

A number of moles = `"Number of molecules"/"Avogadro’s number" = (1.51×10^23)/(6.023×10^23)` = 0.25 moles.

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Chapter 7 Atoms and Molecules
Evaluation | Q VII. 3. ii) | Page 104

Fill in the following blanks :

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