How many grams of calcium cyanide (Ca(CN)₂)are contained in 0.69 mol of calcium cyanide? A)64 B)0.0075 C)1.2 × 10^-24 D)4.2 × 10²³ E)92

Question

Quizplus · Accepted Answer

1 mol of Ca(CN)2 contains 2 mol of cyanide ions (CN-) and 1 mol of calcium ions (Ca2+).
Therefore, 0.69 mol of Ca(CN)2 contains 2 x 0.69 = 1.38 mol of cyanide ions and 0.69 mol of calcium ions.
The molar mass of Ca(CN)2 is (40.08 + 2x12.01 + 2x14.01) g/mol = 92.11 g/mol.
The mass of 0.69 mol of Ca(CN)2 is (0.69 mol) x (92.11 g/mol) = 63.45 g.
Therefore, there are 63.45 g / 1 mol = 64 g/mol of Ca(CN)2 in 0.69 mol of Ca(CN)2.

How Many Grams of Calcium Cyanide (Ca(CN)2)are Contained in 0

How Many Grams of Calcium Cyanide (Ca(CN)₂)are Contained in 0