Calculating the Number of Moles in a Compound

How many moles of MgCl2 are there in 308 grams?

Given data:

Mass in gram of MgCl2 = 308

Molecular mass = 95.21 g/mol

Number of moles = ?

Answer:

There are 3.23 moles of magnesium chloride (MgCl₂).

When calculating the number of moles in a compound, we need to use the formula:

Number of moles = Mass in grams / Molecular mass

Given the data:

Mass of MgCl2 = 308 g

Molecular mass of MgCl2 = 95.21 g/mol

By substituting the values into the formula, we get:

Number of moles = 308 g / 95.21 g/mol

Number of moles = 3.23 mol

Therefore, if the weight of MgCl2 is 308 grams, it will contain 3.23 moles of MgCl2. The mass in grams of MgCl2 is divided by its molecular mass to determine the number of moles.

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