(a) Carbon monoxide ( CO ) is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentration of 08.0 × 10 2 ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in liters occupied by carbon monoxide in a room that measures 17 .6 m long . 8 .80 m wide, and 2 .64 m high at this concentration. (b) Prolonged exposure to mercury ( Hg ) vapor can cause neurological disorders and respiratory problems. For safe air quality control, the concentration of mercury vapor must be under 0 .050 mg/m 3 . Convert this number to g/L . (c) The general test for type II diabetes is that the blood sugar (glucose) level should be below 120 mg per deciliter ( mg/dt ) . Convert this number to micrograms per milliliter ( μ g/mL) .
(a) Carbon monoxide ( CO ) is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentration of 08.0 × 10 2 ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in liters occupied by carbon monoxide in a room that measures 17 .6 m long . 8 .80 m wide, and 2 .64 m high at this concentration. (b) Prolonged exposure to mercury ( Hg ) vapor can cause neurological disorders and respiratory problems. For safe air quality control, the concentration of mercury vapor must be under 0 .050 mg/m 3 . Convert this number to g/L . (c) The general test for type II diabetes is that the blood sugar (glucose) level should be below 120 mg per deciliter ( mg/dt ) . Convert this number to micrograms per milliliter ( μ g/mL) .
Solution Summary: The author explains that dimensional analysis is used to set up and solve a unit conversion problem using conversion factors.
(a) Carbon monoxide
(
CO
)
is a poisonous gas because it binds very strongly to the oxygen carrier hemoglobin in blood. A concentration of
08.0
×
10
2
ppm by volume of carbon monoxide is considered lethal to humans. Calculate the volume in liters occupied by carbon monoxide in a room that measures
17
.6 m long
. 8
.80 m wide, and 2
.64 m
high at this concentration. (b) Prolonged exposure to mercury
(
Hg
)
vapor can cause neurological disorders and respiratory problems. For safe air quality control, the concentration of mercury vapor must be under
0
.050 mg/m
3
. Convert this number to
g/L
. (c) The general test for type II diabetes is that the blood sugar (glucose) level should be below 120 mg per deciliter
(
mg/dt
)
. Convert this number to micrograms per milliliter
(
μ
g/mL)
.
51. A concentrated perchloric acid solution is 65.8% HClO4 by mass and its density is 1.68 g mL−1. What volume (in litres) of the concentrated perchloric acid solution is needed to make 1.81 L of 2.62 mol L−1 HClO4(aq)?
One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silver nitrate solution. Any chloride
anions in solution will combine with the silver cations to produce bright white silver chloride precipitate.
Suppose an EPA chemist tests a 200. mL sample of groundwater known to be contaminated with iron(III) chloride, which would react with silver nitrate solution
like this:
FeCl3(aq) + 3 AgNO3(aq)
3 AgCl(s) +
Fe(NO3),(a9)
The chemist adds 56.0 mM silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds
she has collected 2.8 mg of silver chloride.
Calculate the concentration of iron(III) chloride contaminant in the original groundwater sample. Be sure your answer has the correct number of significant
digits.
mg
L
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell