Question

Calcule a massa de:

a) 1 mol de CO2
b) 3 mol de H2O
c) 0,5 mol de H2SO4​

Answer 1

Olá!:

a ) Massa molar CO₂ = ( 12 * 1 ) + ( 16 * 2 ) => 44 g/mol , logo 1 mol de CO₂ equivale a 44 g

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b) Massa molar H₂O = ( 1 *2 ) + ( 16 * 1 ) => 18 g/mol

1 mol H₂O ----------------------- 18 g

3 mols H₂O -------------------- x

x = 3 * 18 / 1

x =  54 / 1

x = 54 g

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c) Massa molar H₂SO₄ = ( 1 * 2 ) + ( 32 * 1 ) + ( 16 * 4 ) => 98 g/mol

1 mol H₂SO₄ ------------------------- 98 g

0,5 mols H₂SO₄ -------------------- y

y = 0,5 * 98 / 1

y = 49 / 1

y = 49 g

Espero ter ajudado!