A chemical reaction produces 3.81g potassium chloride (KCl). How many formula units of potassium chloride are there? *Find Molar Mass of KCl* Answer is 3.08 E 22 formula units, but I need the work shown

The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²

Given:

Mass of KCl= 3.81 g

To find:

Formula units of KCl=?

Molar Mass of KCl = 74.55 g/mol

So, substituting the values in order to calculate number of moles

1 mole of a substance = Avogadro's number (6.022 × 10²³) of  formula units

Thus, 0.051 moles of KCl will contain

→The number of formula units in 3.81 g of potassium chloride (KCl)

= 3.08 × 10²² formula units.

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The number of formula units in 3.81 g of potassium chloride (KCl) is approximately 3.08 × 10²²

Explanation:

The given parameters is as follows;

The mass of potassium chloride produced in the chemical reaction (KCl) = 3.81 g

The required information = The number of formula units of potassium chloride (KCl)

The Molar Mass of KCl = 74.5513 g/mol

Therefore, we have;

1 mole of a substance, contains Avogadro's number (6.022 × 10²³) of  formula units

Therefore;

0.051106 moles of KCl contains 0.051106 × 6.022 × 10²³  ≈ 3.077588 × 10²² formula units

From which we have, the number of formula units in 3.81 g of potassium chloride (KCl) ≈ 3.08 × 10²² formula units.