Question

1) Determine a massa molar das seguintes substâncias :
a)HClO4
b)Na2CO3
c)C2H6O
d)Al2 (C2O4)3
ALGUÉM SABE ????​

Answer 1

Resposta:

a)HClO4  = 100,5 g/mol

b)Na2CO3  = 106,0 g/mol

c)C2H6O  =  46,0 g/mol

d)Al2(C2O4)3 = 318,0 g/mol

Explicação:

a) HClO4

MM(HClO4 ) = 1,0 g/mol + 35,5 g/mol + 4 . 16,0 g/mol = 100,5 g/mol

b) Na2CO3

MM(Na2CO3 ) = 2 . 23,0 g/mol + 12,0 g/mol + 3 . 16,0 g/mol =  106,0 g/mol

c) C2H6O

MM(C2H6O ) = 2 . 12,0 g/mol + 6 . 1,0 g/mol + 16,0 g/mol = 46,0 g/mol

d) Al2(C2O4)3

MM(Al2(C2O4)3) = 2 . 27,0 g/mol + 6 . 12,0 g/mol + 12 . 16,0 g/mol = 318,0 g/mol