Question

Calcule a massa molar de cada substância abaixo,DADOS:C=12 g/mol,4=1 g/mol,0=16 g/mol,S=32 g/mol,N=14 g/mol,Fe=56 g/mol.
A)Fe2O3
B)C4H6O3
C)H2S
D)C17H19NO3
E)C6H10

Answer 1

Resposta:

a) 160 g/mol

b) 102 g/mol

c) 34 g/mol

d) 285 g/mol

e) 82g/mol

Explicação:

a) MM = (m ferro x 2) + (m oxigênio x 3)    

$MM = (56 g/mol) * 2 + (16 g/mol)* 3\\MM= 160 g/mol$

b)

$MM = (m carbono * 4) + (m hidrogenio *6) + (m oxigenio* 3)\\MM = (12 g/mol * 4) + (1g/mol * 6) + (16g/mol *3)\\MM = 102 g/mol$

c)

$MM = (1g/mol * 2) + (32g/mol *1)\\MM= 34 g/mol$

d)

$MM= (12g/mol *17) + (1g/mol *19) + (14g/mol * 1) + (16g/mol * 3)\\MM = 285g/mol$

e)

$MM= (12g/mol * 6) + (1g/mol *10)\\MM= 82g/mol$