Question

Calcule a massa molar dos compostos a seguir.
Dados: H = 1g; Na = 23g ; Cl = 35,5g; O = 16g;
2 NaOH = HCl = H2O=

7 NaCl = H2O2 =

Answer 1

a) 2 NaOH: 23 + 16 + 1 = 40 . 2 = 80 g/mol

b) HCl = 1 + 35,5 = 36,5 g/mol

c) H2O = 1 . 2 + 16 = 18 g/mol

d) 7 NaCl = 23 + 35,5 = 58, 5 . 7 = 409,5 g/mol

e) H2O2 = 2 . 1 + 2 . 16 = 24 g/mol