Question

I really need help with this please!
If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

Answer 1

add up 45.8 and 205.

Answer 2

@Tayllork

Answer 3

That equals 250.8

Answer 4

Then divide 45.8 by 250.8 and multiply by 100 for the percent MgO.
And divide 205 by 250.8 and multiply by 100 for the percent water.

Answer 5

18.3%! Thank you so much! @okdutchman7

Answer 6

That's right. Good Job! @Tayllork

Answer 7

Thank you! (: @okdutchman7