Question

question 2
how many grams of calcium hydroxide, ca(oh)₂, are in 5.20 moles of calcium hydroxide?
how many grams of calcium hydroxide, ca(oh)₂, are in 5.20 moles of calcium hydroxide?
74.1 g ca(oh)₂
385 g ca(oh)₂
0.0702 g ca(oh)₂
14.3 g ca(oh)₂

Explanation:

Step1: Calcular la masa molar de Ca(OH)₂

La masa atómica de Ca es aproximadamente 40.08 g/mol, la de O es 16.00 g/mol y la de H es 1.01 g/mol.
Masa molar de Ca(OH)₂ = 40.08 + 2×(16.00 + 1.01) = 40.08+2×17.01 = 40.08 + 34.02 = 74.1 g/mol

Step2: Calcular la masa en gramos

Usamos la fórmula masa = moles × masa molar.
Dados 5.20 moles de Ca(OH)₂, entonces masa = 5.20 mol×74.1 g/mol = 385.32 g ≈ 385 g

Answer:

385 g Ca(OH)₂