Question

How many units of MgSO4 are present in 18.0g of this compound? units as in mass? molecules? or atoms?

Answer 1

Use dimensional analysis to convert to moles. This can be see by the relationship on the periodic table - molar mass. Which means their units are: \(\frac{ g }{ mol }\). Then, similar to how you did in algebra, cancel units. Then use avogadro's number to convert to molecules/ atoms: \(6.022 \times 10^{23} \frac{ molecules/atoms }{ mol }\)

Answer 2

so by the word "units" it's asking for grams?

Answer 3

Yes. Units is some type of measurement.

Answer 4

9.00 x 10^22?