What is the solubility of potassium nitrate (kno3) in 100 grams of water at 50 celsius?

90 g/100 g water

Explanation:

I’m guessing that “they” are asking you to interpret a solubility curve something like the one below.

Find the point at 50 °C on the horizontal axis.

From there, draw a vertical line until it meets the solubility curve of KNO₃.

Then, draw a horizontal line to the solubility axis.

It appears to hit the axis at about 90 g/100 g water.

Thus, the solubility of KNO₃ at 50 °C is 90 g/100 g water.

is there multiple choice answers?

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)