Question

(1) Encontre a massa molar das seguintes substâncias: (H=1, C1=35, S=32, O=16, Na=23, Ni=59)

(a) HCL _____________________________
(b) H2SO4 ___________________________
(c) H2SO3____________________________
(d) NaOH_____________________________
(e)Ni(OH)2____________________________

Answer 1

Só somar as massas atômicas dos átomos que compõe as substâncias.

a) HCl = 1 + 35 = 36 g/mol.
b) H2SO4 = (2*1) + 32 + (4*16) = 98 g/mol.
c) H2SO3 = (2*1) + 32 + (3*16) = 82 g/mol.
d) NaOH = 23 + 16 + 1 = 40 g/mol.
e) Ni(OH)2 = 59 + (2*16) + (2*1) = 93 g/mol.