How many formula units make up 36.2 g of magnesium chloride (MgCl2)?

2.29 × 10²³ formula units of MgCl₂

Explanation:

Given data:

Mass of MgCl₂ = 36.2 g

Number of formula units = ?

Solution:

The given problem will be solved 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.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water  = 6.022 × 10²³ formula units of water.

In 36.2 g of MgCl₂:

Number of moles = mass / molar mass

Number of moles = 36.2 g / 95.211 g/mol

Number of moles = 0.38 mol

1 mole = 6.022 × 10²³ formula units

0.38 mol / 1mol × 6.022 × 10²³ formula units

2.29 × 10²³ formula units of MgCl₂

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.