Question 335050
If you spill out nitrite and replace it with nitrate, what is the 80% a solution of?

Let = the amount that was spilled

We start with 270 ml of some compound of nitrogen and oxygen in the flask. In the spill, we lose .9x ml of the compound. The replacement gets us back .3x ml of compound, and we have 240 ml of compound at the end.

270 - .9x + .3x = 240

270 - .6x = 240
.6x = 30
x = 50 ml)