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o professor do ensino médio que é obcecado por moléculas
7
Comentario
Descargar
Você sabia que o que está aí na imagem é 1 mol de moléculas? Mas… o que é um mol, afinal? Na Química, usamos o mol para contar partículas muito pequenas, como átomos e moléculas. 1 mol equivale a 6,022 × 10²³ partículas — esse número enorme é chamado de Número de Avogadro. E tem mais: A massa em gramas de 1 mol de uma substância é numericamente igual à massa atômica ou molecular dela. Exemplo: • 1 mol de água tem 18 g e contém 6,022 × 10²³ moléculas. • 1 mol de NaCl tem 58,5 g e contém e
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1
Descargar
Cargando
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