Relações entre Massa e Quantidade de Matéria – Estequiometria Aula de Química – Perito Criminal Maio de 2015.

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Presentation transcript:

Relações entre Massa e Quantidade de Matéria – Estequiometria Aula de Química – Perito Criminal Maio de 2015

Massa Atômica

Mol  Mol: amontoado de pedras  1 mol = (átomos, moléculas, íon ou fórmula)  Constante de Avogadro: 6,  mol de átomos de Fe átomos de Fe 1 mol de moléculas de O moléculas de O 2 1 mol de elétrons elétrons 1 mol de íons Na íons de Na + 2 mols de átomos de Au átomos de Au 3 mols de moléculas de H 2 O moléculas de H 2 O 0,5 íons de Cℓ − íons de Cℓ −

Massa Molar 1 u = 1 g/mol Massa Molar: é a massa de um mol de unidades (átomos, moléculas, elétrons, íons e fórmulas).

Massa Molar MolMassa (g)Moléculas 118 g g ,59 g

Cálculo Estequiométrico