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nasty-shy [4]
3 years ago
6

How many formula units make up 12.8 g of magnesium chloride ( MgCl2)? Express the number of formula units numerically.

Chemistry
1 answer:
Advocard [28]3 years ago
8 0

Answer:

For 12.8 g there 0.807 × 10³ formula units.

Explanation:

Given data:

Mass of MgCl₂ = 12.8 g

Formula units for given mass = ?

Solution:

First of all we will calculate the number of moles.

Number of moles = mass/molar masss

Number of moles = 12.8 g/ 95.211 g/mol

Number of moles = 0.134 mol

According to the Avogadro number,

one moles = 6.022 × 10³ formula units

For 0.134 mol,

0.134 × 6.022 × 10³ formula units

0.807 × 10³ formula units

For 12.8 g there 0.807 × 10³ formula units.

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