Question

Calcular a massa molar (MM) das seguintes moléculas.

Dados:
Na =23; 0= 16, P=31; H=1; C=12; Mg=24, S=32

a) NaOH
b) CO²
c)H³PO⁴
d)C⁴H¹⁰
e) MgSO⁴​

Answer 1

a) NaOH

Na = 1 x 23 = 23

O = 1 x 16 = 16

H = 1 x 1 = 1

23 + 16 + 1 = 40g/mol

b) CO²

C = 1 x 12 = 12

O = 2 x 16 = 32

32 + 12 = 44g/mol

c)H³PO⁴

H = 3 x 1 = 3

P = 1 x 31 = 31

O = 4 x 16 = 64

3 + 31 + 64 = 98

d)C⁴H¹⁰

C = 4 x 12 = 48

H = 10 x 1 = 10

48 + 10 = 58g/mol

e) MgSO⁴

Mg = 1 x 24 = 24

S = 1 x 32 = 32

O = 4 x 16 = 64

24 + 32 + 64 = 120g/mol