a/ => MA= 17 x 2 = 34( g/mol)
b/ => MB= 1,517 x 29 = 43,993(g/mol) \(\approx\) 44 ( g/mol)
a) \(\frac{M_A}{M_{H2}}=17\)\(\Rightarrow M_A=17.2=34\left(\frac{g}{mol}\right)\)
b) \(\frac{M_B}{M_{kk}}=1,517\Rightarrow M_B=1,517.29=43,993\left(\frac{g}{mol}\right)\)