Q5) A 63.5 g sample of ground water is found to have a lead concentration of 19.85 ppm. Calculate the mass of lead in the sample in milligrams.
Q4) A 2105 g sample of ground water is found to contain 0.0500 g of arsenic. Calculate the concentration of arsenic in parts per million, ppm.\
Q5) A 63.5 g sample of ground water is found to have a lead concentration of...
A 56.2 g sample of ground water is found to have a lead concentration of 17.39 ppm. Calculate the mass of lead in the sample in milligrams.
A 90.6 g sample of ground water is found to have a lead concentration of 11.71 ppm. Calculate the mass of lead in the sample in milligrams.
A 1435 mL sample of drinking water was found to contain 67.0 mg of lead. Calculate the concentration of lead in milligrams per liter. lead concentration: m g/L Calculate the percent mass per volume, % (m/v), of a dextrose solution containing 8.00 g of dextrose in 2.00 x 10 mL of solution. Note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v). percent mass per volume concentration: %...
Isopropyl alcohol is mixed with water to produce a 38.0% (v/v) alcohol solution. How many milliliters of each component are present in 875 mL of this solution? Assume that volumes are additive. alcohol: mL water: ml The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 695 mL of a 38.0% (w/v)...
A 1025 mL1025 mL sample of drinking water was found to contain 33.0 mg33.0 mg of lead. Calculate the concentration of lead in milligrams per liter.
If a 150 mL sample of water from a lake is found to contain 1.7 μg of arsenic (As), what is the concentration of arsenic in the sample in parts per billion (ppb)?
18. If the concentration of the herbicide atrazine, commonly used in corn prode a water sample is 0.1 g/L, how many parts per million are present? 19. An elementary school wants to ensure the lead concentration in its soil is less than 100 ppm. If the administration sends a soil sample for analysis and the report indicates a lead concentration of 15,000 μg/g, is this soil concentration under the 100 ppm limit?
A 267.8-g sample of ground water is analyzed for calcium. The Ca2+ in the sample is first precipitated and filtered-off as NH4CaPO4·7H2O. This precipitate is dried and heated, releasing water and ammonia to yield anhydrous calcium pyrophosphate (Ca2P2O7). The mass of Ca2P2O7 obtained is 0.0437 g. Give the calcium content of the ground water in parts per million (to three significant figures).
The drinking water in Saplingville was found to contain 12 ppb (parts per billion) of lead. What is the concentration of lead in molarity?
Suppose a group of volunteers is planning to build a park near a local lake. The lake is known to contain low levels of arsenic (As). Therefore, prior to starting construction, the group decides to measure the current level of arsenic in the lake. If a 13.9 cm3 sample of lake water is found to have 165.1 ng As, what is the concentration of arsenic in the sample in parts per billion (ppb), assuming that the density of the lake...