Posted by **Lisa** on Sunday, December 28, 2008 at 3:55pm.

how much sugar is dissolved in 500 grams of a solution if the solution is 70 percent sugar by mass?

Also,

What is the concentration of a solution that contains 45 grams of sugar in 500 grams of solution?

thank you

- physical science -
**drwls**, Sunday, December 28, 2008 at 4:01pm
70% of 500 g, since the 500 g "solution" is the sum of both sugar and water.

- physical science -
**DrBob222**, Sunday, December 28, 2008 at 4:05pm
For the second problem,

[mass sugar/mass solution]*100 = percent by mass.

- physical science -
**Lisa**, Sunday, December 28, 2008 at 4:20pm
Thank you DrBob222 for your kind help !! :)

- physical science -
**Trish**, Sunday, May 13, 2012 at 6:41pm
. A solution contains 45 grams of nitrogen(N2) gas and 40 grams of argon(Ar). What is the mole fraction of argon in this solution?

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