Question

the epa also uses ppm or parts per million. 1 ppm is 1 gram of a substance in 1,000,000 grams of solution.
1 ppm is a thousand times more concentrated than 1 ppb (part per billion).
1 ppm is equivalent to 1 mg / l
1 ppb is equivalent to 1 ug / l

• ug is a microgram, and a microgram is 10^{-6} grams or 0.0000001 grams.

match the unit of concentration to the correct term:
molarity
ppm
ppb
mg/l
mols/
liter
g/l

Explanation:

• Molarity is defined as moles of solute per liter of solution, so it matches mols/Liter.
• ppm (parts per million) is equivalent to mg/L as given in the text (1 ppm = 1 mg/L).
• ppb (parts per billion) is equivalent to ug/L as 1 ppb = 1 ug/L (since 1 ppm is a thousand times more concentrated than 1 ppb and 1 ppm = 1 mg/L, 1 ppb = 0.001 mg/L = 1 ug/L).

Answer:

Molarity - mols/Liter, ppm - mg/L, ppb - ug/L.