Question

4- CALCULE A MASSA MOLECULAR (ou massa atômica) DAS SEGUINTES SUBSTÂNCIAS:
A) ZnCl2
B) Pb
C) KOH
D) NH3
E) HCl
F) CF4
G) NO
H) Na2S
I) CaO
J) MgCl2

Answer 1

Resposta:

A) 136,4

B) 207,2

C) 56,1

D) 17,0

E) 36,5

F) 88,0

G) 30,0

H) 78,0

I) 56,1

J) 95,3

Explicação:

A) ZnCl2 = (65,4 x 1) + (35,5 x 2) = 136,4

B) Pb = 207,2

C) KOH = (39,1 x 1) + (16,0 x 1) + (1,00 x 1) = 56,1

D) NH3 = (14,0 x 1) + (1,0 x 3) = 17,0

E) HCl = (1,0 x 1) + (35,5 x 1) = 36,5

F) CF4 = (12,0 x 1) + (19,0 x 4) = 88,0

G) NO = (14,0 x1) + (16,0 x1) = 30,0

H) Na2S = (23,0 x 2) + (32,1 x 1) = 78,0

I)  CaO = (40,1 x 1) + (16,0 x 1) = 56,1

J) MgCl2 = (24,3 x 1) + (35,5 x 2) = 95,3