Question

Calculate the number of moles in 11.7g of Zn(CN)2

Answer 1

To find the number of moles in 11.7g of Zn(CN)2, divide the mass by the molar mass. The number of moles is approximately 0.0793 moles.

Step-by-step explanation:

To calculate the number of moles in 11.7g of Zn(CN)2, we first need to find the molar mass of Zn(CN)2. Zinc (Zn) has a molar mass of 65.39 g/mol, and cyanide (CN) has a molar mass of 26.02 g/mol. Since Zn(CN)2 has two CN groups, we multiply the molar mass of CN by 2. Adding these masses together, we get a molar mass of 147.43 g/mol for Zn(CN)2.

Now, we can use the formula:

moles = mass / molar mass

Substituting the values, we have:

moles = 11.7g / 147.43 g/mol = 0.0793 moles (rounded to four decimal places).