How many formula units make up 16.4 g of magnesium chloride (mgcl2)?

The number of formula units in the given amount of magnesium chloride is

Explanation:

To calculate the number of moles, we use the equation:

Given mass of magnesium chloride = 16.4 g

Molar mass of magnesium chloride = 95.2 g/mol

Putting values in above equation, we get:

Formula units is defined as lowest whole number ratio of ions in an ionic compound. It is calculated by multiplying the number of moles by Avogadro's number which is

We are given:

Number of moles of magnesium chloride = 0.172 moles

Number of formula units =

Hence, the number of formula units in the given amount of magnesium chloride is

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