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18 solutions

ppm

Q. PQ-8. A 1400 g sample of stream water contains 12.2 ppm of mercury. What is the mass of Hg in the sample? a) 0.11 mg b) 2.4 mg c) 8.7 mg d) 17 mg

Solved • Dec 13, 2019

ppm

Q. What is the concentration (by mass) of the solute in a solution prepared by dissolving 2.50x10^-7 mol Na3PO4 in 1 L of water (in ppm, ppb, and ppt, all two decimal places)?

Solved • Sep 22, 2019

ppm

Q. A 6.0 M acetic acid solution has a density of 1.05 g/mL. A) what is the concentration of this solution in molarity? B) what is the concentration of this solution in parts- per- million ?

Solved • Nov 23, 2019

ppm

Q. Calculate the concentration in ppm of a pollutant that has been measured at 450 mg per 150 kg of sample. a) 3.0 ppm b) 330 ppm c) 3000 ppm d) 6.0 ppm e) none of the above

Solved • Nov 7, 2019

ppm

Q. The mole fraction of neon in the air is about 2.6 x 10–5. If the average molar mass of air is 28.96 g/mol what is the concentration of neon in air in ppm?

Solved • Oct 7, 2019

ppm

Q. The average lithium ion concentration in seawater is 0.20 ppm. What is the molality of Li^+ in seawater?

Solved • Sep 23, 2019

ppm

Q. 7. What is the concentration (by mass) of the solute in a solution prepared by dissolving 2.50 x 10^-7 mol Na3PO4 in 1 L of water (in ppm, ppb, and ppt, all to two decimal places)?

Solved • Sep 20, 2019