Question

how many grams of mg(oh)₂ are in 7.5 x 10²³ formula units (f.un.) mg(oh)₂? which part of the conversion factor goes in the green box? 7.5 x 10²³ f.un. 6.02 x 10²³ f.un. 58.32 g 1 mole

Explanation:

Step1: Use Avogadro's number

We know that \(1\) mole of a substance contains \(6.02\times 10^{23}\) formula units. So, to convert formula units to moles, we use the conversion factor \(\frac{1\space mole}{6.02\times 10^{23}\space f.un.}\).

Step2: Use molar mass

The molar mass of \(Mg(OH)_2\) is \(58.32\space g/mol\). To convert moles to grams, we use the conversion factor \(\frac{58.32\space g}{1\space mole}\).

Answer:

\(6.02\times 10^{23}\space f.un.\) goes in the green box.