How many moles of Al (CN) 3 are in 251 g of the compound?

251 g of compound contain 2.39 moles.

Explanation:

Given dа ta:

mass of compound Al (CN) 3 = 251 g

moles = ?

Solution:

First of all we will calculate the molar mass of given compound.

molar mass of Al (CN) 3 = 26.98 + (26 * 3)

molar mass of Al (CN) 3 = 105 g/mol

Formula:

number of moles = mass / molar mass

number of moles = 251 g / 105 g/mol

number of moles = 2.39 mole