Question

Calculați masa a 18,066 × 10^24 molecule de azot.

Answer 1

180,66 * 10^23 molecule N2 ....... x grame N2

6,023 * 10^23 molecule N2 ......... 28 grame N2

$x=\frac{180,66*10^{23}*28}{6,023*10^{23}}=839,86g$

De tinut minte!

Numarul lui Avogadro = 6,023*10^23 molecule/atomi per mol