A 25.0 mL aliquot of a well-shaken and filtered sample of river is pipetted into an evaporating dish. The sample was heated to dryness. Assume the density of the river water was 1.01g/mL. The following data were collected for Trial 1. Complete the data. Record values with the correct number of significant figures.

Question

1. Mass of evaporating dish (g): 26.217
2. Mass of water sample plus evaporating dish (g): 51.467 
3. Mass of water sample (g): 25.25g (THIS WAS WHAT I CALCULATED- IS IT RIGHT?)
4. Mass of dried sample plus evaporating dish (g): 35.291
5. Mass of dissolved solids in 25-mL aliquot of filtered sample (g): HOW DO I FIND THIS? 
6. Mass of dissolved solids per total mass of sample (g solids/ g sample) show calculation..HOW DO I FIND THIS? 
7. Total solids (g solids/ g sample, ppt). HOW DO I FIND THIS?

PLEASE HELP ME FIGURE THIS OUT? I DON'T UNDERSTAND. 
thank you!

DrBob222 · Accepted Answer

part 3 is right. part 5 is 4-1 part 6 is 5-3 I don't understand the question for 7. g solids/g sample is the same as part 6.

estel · Answer

question 5.6 and 7