qual a massa e o número de mols correspondente a 1,2x10^23 átomos de Ca?
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Olá!!!
MM(Ca) = 40g/mol
1 mol ---- 40g ------ 6,02•10²³
X ----------------------- 1,2•10²³
X = 1 • 1,2•10²³ / 6,02•10²³
X = 0,19 mol
1 mol ---- 40g ------ 6,02•10²³
X. ---------- 1,2•10²³
X = 40 • 1,2•10²³ / 6,02•10²³
X = 4,8•10²⁴ / 6,02•10²³
X = 7,9g
MM(Ca) = 40g/mol
1 mol ---- 40g ------ 6,02•10²³
X ----------------------- 1,2•10²³
X = 1 • 1,2•10²³ / 6,02•10²³
X = 0,19 mol
1 mol ---- 40g ------ 6,02•10²³
X. ---------- 1,2•10²³
X = 40 • 1,2•10²³ / 6,02•10²³
X = 4,8•10²⁴ / 6,02•10²³
X = 7,9g
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