8. What is the mass of 2.31 x 1023 formula units of SrF2?

47.74 g

Explanation:

Given data:

Formula units of SrF₂ = 2.31 ×0²³

Mass of SrF₂ = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ formula units

2.31 ×0²³formula units × 1 mol / 6.022 × 10²³ formula units

0.38 mol

Mass of  SrF₂:

Mass = number of moles × molar mass

Mass = 0.38 mol × 125.62 g/mol

Mass = 47.74 g

a chemical reaction happens

explanation:

c. is the answer

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