Question

b) calculate the number of entities in one mole of substance

Answer 1

$no. \: \: of \: moles = \frac{no. \: of \: entities}{avogadro \: no.}$

so ,

no. of moles = 1 and avogadro no. = 6.022 × 10 ²³

then,

$1 = \frac{no. \: of \: entities}{6.022 \times {10}^{23} }$

$no. \: of \: entities = 6.022 \times {10}^{23}$

hence proved.

hope u got it.....