Question

question 3 how many grams of magnesium hydroxide, mg(oh)₂, are in 4.66 moles of magnesium hydroxide? 272 g mg(oh)₂ 785 g mg(oh)₂ 251 g mg(oh)₂ 456 g mg(oh)₂

Explanation:

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

La masa molar de Mg es 24.31 g/mol, la de O es 16.00 g/mol y la de H es 1.01 g/mol.
$M_{Mg(OH)_2}=24.31 + 2\times(16.00 + 1.01)=24.31+2\times17.01 = 24.31 + 34.02=58.33$ g/mol

Step2: Calcular la masa en gramos

Utilizamos la fórmula $m = n\times M$, donde $n = 4.66$ moles y $M = 58.33$ g/mol.
$m=4.66\times58.33 = 272.8178\approx272$ g

Answer:

272 g Mg(OH)₂