Question

Convert 1.27 moles of magnesium carbonate to formula units.

Answer 1

We have the number of moles of magnesium, now we will use the Avogadro number to determine formula units:

`\text{Avogadro number = }6.022\text{ }*10^(23)`

Avogadro number says that one mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). Does not matter which is the substance, always 1 mol will be 6.022 x 10^23 formula units.

We have 1.27 moles so we will have:

`1.27\text{ mol }*\text{ }\frac{\text{6.022}*10^(23)fu\text{.}}{1\text{ mol}}\text{ =}7.65\text{ }*10^(23)formula\text{ units}`

1.27 moles of magnesium are equivalent to 7.65 x 10^23 formula units