Question

A student needs to add exactly 4.20 mol of NaOH to a beaker. The beaker already contains 450 mL of H₂O. How many grams of NaOH does the student need to measure out?

How many grams will need to be weighed out on a scale so that 4.20 moles of NaOH are in the beaker? 

Answer 1

40grams of NaOH the student need to measure out.

a) 160g