Question

A pinch of salt has

Answer 1

13.29 X $10^{21}$ moles of NaCl are in a pinch of salt and a pinch of salt has

approximately 3.29x$10^{21}$ formula units of NaCl.

What are moles?

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is “mol”.

We know that 1 formula unit of sodium chloride has a molar mass of 58.44g/mol

Hence;

Mass of 1 formula unit = 58.44g

Mass of 3.29 x $10^{21}$ formula units

13.29 x $10^{21}$ x 58.44g

776.6676 x $10^{21}$

Moles =$\frac{776.6676 X 10^{21} }{ 58.44g}$

Moles = 13.29 X $10^{21}$

Therefore;

13.29 X $10^{21}$ moles of NaCl are in a pinch of salt.

Learn more about moles here:

brainly.com/question/15209553

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