Which of the following describes a saturated solution? A. 70 grams of KNO3 dissolved in 100 grams of water at 50°C
В.
40 grams of NaCl dissolved in 100 grams of water at 50°C
C.
40 grams of KCl dissolved in 100 grams of water at 43°C
D.
70 grams of NaNO3 dissolved in 100 grams of water at 0°C

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i have no clue hope you find the answer

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)