14. Solutions

Parts per Million (ppm)

객관식
What is the concentration of 0.5 g KCl in 3000 g of water in parts per million (ppm)?
819
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객관식
A sample of seawater has a strontium concentration of 57 ppm. What is the mass of strontium in grams in 1 liter of seawater, assuming the density of seawater is 1.025 g/mL?
629
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객관식
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
100
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객관식
If the concentration of fluoride ions in a nearby river is 14 ppm, how many milligrams of fluoride ions are present in 1 liter of river water?
97
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객관식
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
102
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객관식
In water-treatment and food-safety settings, a chemical sanitizer concentration in dilute aqueous solution is most commonly expressed as which unit?
77
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객관식
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
98
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객관식
A 1400 g sample of stream water contains 12.2 ppm of mercury (Hg). What is the mass of Hg present in the sample?
103
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객관식
If the pH of rainwater is 5.6, what is the approximate concentration of CO_2 in parts per million (ppm) in the rainwater?
104
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객관식
A water sample contains 0.005 g of sodium (Na) in 1.0 L of water. What is the concentration of sodium in parts per million (ppm)?
95
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객관식
Amphetamines in urine can be confirmed by mass spectrometry at a concentration of 500 ng/mL. Assuming a urine density of 1.025 g/mL, what is this concentration in parts per million (ppm)?
513
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객관식
A water sample contains the pollutant chlorobenzene with a concentration of 16 ppm (by volume). What volume of this water contains 5.01×10² mL of chlorobenzene?
3746
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13
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2
comments
객관식
The average human body contains about 5,000 grams of blood. What mass of arsenic is present in the body if the amount in blood is 0.86 ppb?
5092
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3
rank
1
comments
객관식
A 5.12 L sample of solution contains 0.230 g of potassium sulfate, K₂SO₄. Determine the concentration of K₂SO₄ in ppm if the density of the solution is 1.30 g/mL.
2218
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8
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1
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객관식
A water sample is found to contain the pollutant chlorobenzene with a concentration of 15 ppb (by mass). What volume of this water contains 5.00 × 10² mg of chlorobenzene? (Assume a density of 1.00 g/mL.)
727
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