Question

What is the molarity if 90 grams of magnesium oxide is present in 750 mL of solution?

Answer 1

The solution is `3` `"M"`

Explanation:

The moles of magnesium oxide `=90/40=2.25` mols

`"n"="cv" rarr"c" = "n"/"v"`

`2.25/(750divide1000)=3` `"mol"` `"dm"^3`