chemistry question help

Question

If a solution of phosphoric acid has a molarity of 0.710, how many moles are present in 916.6 milliliters of the solution?

Answer value

Answer 1

Use dimensional analysis:

916.6 mls x 1 L /1000 mls x 0.710 moles / L = moles (mls cancel and L cancel, leaving moles)

916.6 /1000 x 0.710 = 0.651 moles (3 sig. figs.)