Question

what is the mass of 4.9 * 10^26 molecules of sodium chloride?

Answer 1

One mole of sodium chloride molecules i.e. 6.022 * 10²³ molecules of NaCl weigh 58.44g.

no. of moles in 4.9 * 10²⁶ molecules =$\frac{4.9*1000}{6.022}$ = 813.683 moles.

Mass of 813.638 moles = 47551.644g