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 0.000001 grams.

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

Explanation:

• Molarity is measured in moles per liter ($mol/L$).
• $1\ ppm$ is equivalent to $1\ mg/L$.
• $1\ ppb$ is equivalent to $1\ \mu g/L$.

Answer:

• Molarity: $mol/L$
• $ppm$: $mg/L$
• $ppb$: $\mu g/L$