PLSS HELP Which of the following is the correct formula to calculate percent by mass? (5 points)
O [Mass of solution (g) = mass of solute (9)] x 100
O [Mass of solute (9) = mass of solution (9)] < 100
[Mass of solute (g) - mass of solution (9)] x 100
O [Mass of solution (g) + mass of solute (9)] x 100

The equation for percent by mass is

Explanation:

A solution consists of solute and solvent.

A solute is defined as a component that is present in a smaller proportion.

A solvent is defined as a component that is present in a larger proportion.

Concentration is defined as the amount of solute present in the given amount of solution or solvent.

The percent by mass is defined as the concentration of a solute where the ratio of the mass of solute is taken with respect to the mass of solvent multiplied by 100.

The equation used is:

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

c. 75.7

i think that is the right