The concentration of Cd in lake sediment digestate is 3 µg/L. If 5 g of dry...
The concentration of Cd in lake sediment digestate is 3 µg/L. If 5 g of dry sediment was used, and the total digestate volume is 25 mL, what is the Cd concentration in sediment?
Wouldn't the mass of Cd be the 5g?
Homework Answers
3 µg/L means 3 µg Cd remain in 1 L lake water.
5 g of dry sediment was used, and the total digestate volume is 25 mL = 0.025 L
thus
mass of Cd in 0.025 L lake water = 3 µg/L * 0.025 L = 0.075 µg = 0.075 * 10^-6 g
and
Cd concentration in sediment = 0.075 * 10^-6 g * 10^6 / 5 = 0.015 ppm (answer)
Add Answer to:
The concentration of Cd in lake sediment digestate is 3 µg/L. If
5 g of dry...
If the concentration of mercury in the water of a polluted lake is 0.33 µg/L of...
If the concentration of mercury in the water of a polluted lake is 0.33 µg/L of water, what is the total mass of mercury in the lake, in kilograms, if the lake has a surface area of 10.7 mi2 and an average depth of 45 feet? (Hint: get the volume of the lake first.)
1) A stock solution has a concentration of 100 µg/mL. If 20 µL of stock is...
1) A stock solution has a concentration of 100 µg/mL. If 20 µL of stock is added to a beaker. What is the mass of the dye in µg? 2) If the absorbance of the same dye (after diluted with water to 3 mL) is 0.3 AU, what is A/µg of the dye used?
3. Concentrations in solids and solution. You send a 10-g sample of rice to the lab...
3. Concentrations in solids and solution. You send a 10-g sample of rice to the lab for the determination of the total arsenic content. The analyst dissolves 1.0 g of the rice in 5.0 mL of concentrated acid and then dilutes the solution to a final volume of 25.0 mL. When analyzed by ICP-MS, the solution concentration is found to be 35 µg L-1. What is the concentration of arsenic in the rice (in µg kg-1)? ___________ ppb Hint: Follow...
Ascorbic Acid Concentration (g/L) Volume of DCPIP in Full Syringe Used (mL) Volume of DCPIP in...
Ascorbic Acid Concentration (g/L)
Volume of DCPIP in Full Syringe Used (mL)
Volume of DCPIP in Final Syringe (mL)
Total Volume of DCPIP Used (mL)
0.0
5 mL
4.9 mL
0.1 mL
0.50
5 mL
2 mL
3 mL
1.00
5 mL
1.2 mL
3.8 mL
1.50
5 mL
3.6 mL
6.4 mL
2.00
5 mL
2.8 mL
7.2 mL
Unknown Trial 1
5 mL
2.0 mL
3.0 mL
Unknown Trial 2
5 mL
2.2 mL
2.8 mL
Unknown Trial...
Suppose you find the concentration in your home is 57 ppm by volume at 1.00 atm...
Suppose you find the concentration in your home is 57 ppm by volume at 1.00 atm pressure and 25 °C. What is the concentration in mg/L and in ppm by mass. (The average molar mass for dry air is 28.96 g/mol at 1.00 atm pressure and 25 °C.) what is Concentration = mg /L what is Concentration = ppm
i cant seem to get #4/5 7.2 g Pb 7.2 mg Pb 106 g sln L...
i cant seem to get #4/5
7.2 g Pb 7.2 mg Pb 106 g sln L sln oblems 3-6: 3) A solution should be prepared as 3.56 M calcium chloride, CaCl2. Calculate mass (b) of the VOI solute that is needed in order to prepare 3500 mL of the solution. 3.56M CaCl2 mois. -= 12.46mols 3.5L - mol 12.46 molsy 110. agu Imol = 1382.86 11400g (4) A solution is prepared by dissolving 65 g of ethyl alcohol (density=0.78 g/mL)...
A lake with volume 10^3 m^3 is fed by a pollution-free stream with flow rate 5...
A lake with volume 10^3 m^3 is fed by a pollution-free stream with flow rate 5 m^3/min. A factory dumps 0.1 m^3/s of a non-conservative waste with concentration 100 mg/L into the lake. The pollutant has a reaction rate coefficient K of 0.2/day. Assuming the pollutant is well mixed in the lake; find the steady-state concentration of pollutant in lake.
question 2 Part 4C Data Tables: [5 pts.] Lake Alpha: Please record the data indicated for...
question 2
Part 4C Data Tables: [5 pts.] Lake Alpha: Please record the data indicated for the three titrations of 50.0 mL of Lake Alpha Water and 20 drops methyl red indicator using the 0.0180 M sulfuric acid titrant. Calculate the "Volume of Titrant Used. Use correct significant figures TRIAL # VOLUME OF TITRANT USED TUIN INITIAL VOLUME FINAL VOLUME OF TITRANT OF TITRANT Oom 1814ML OoomL 1813ML Oom 18:2m. Average Volume of Titrant Used 18.4mL 18. 3ML 1812mL 13.35...
Experiment Quantitative Titration - Part 1: Standardization of Sodium Hydroxide Solution Concentration of HCL standard solution...
Experiment Quantitative Titration - Part 1: Standardization of Sodium Hydroxide Solution Concentration of HCL standard solution / mol L^-1 = 0.09745 Volume of HCL solution / mL = 25 Indicator: Bromothymol Blue Average Volume of NaOH / mL = 24.35 Please find concentration of NaOH / mol^-1 Part 2 - Determination of the concentration of acetic acid Volume of Acedic Acid Solution / mL = 10 Indicator: Phenolphthalein Average Volume of NaOH / mL = 30.94 Please find the concentration...
5. What is the osmolarity of a solution of 40 g/L Nagu (40.00 g/mole)? 6. A...
5. What is the osmolarity of a solution of 40 g/L Nagu (40.00 g/mole)? 6. A saline solution has an osmolarity of 0.996 OsM. What is the milliosmolarity of this solution? 7. How much 100% reagent is required to make 250 mL of 1X reagent? 8. 8. The concentration of a 1/50 dilution is 0.50 g/L. What is the starting concentration? 9. 9. How much 50 mg/dl solution is required to make 100 mL of 5 mg/dl solution? 10. 10....
Ascorbic Acid Concentration (g/L)
Volume of DCPIP in Full Syringe Used (mL)
Volume of DCPIP in Final Syringe (mL)
Total Volume of DCPIP Used (mL)
0.0
5 mL
4.9 mL
0.1 mL
0.50
5 mL
2 mL
3 mL
1.00
5 mL
1.2 mL
3.8 mL
1.50
5 mL
3.6 mL
6.4 mL
2.00
5 mL
2.8 mL
7.2 mL
Unknown Trial 1
5 mL
2.0 mL
3.0 mL
Unknown Trial 2
5 mL
2.2 mL
2.8 mL
Unknown Trial...
i cant seem to get #4/5
7.2 g Pb 7.2 mg Pb 106 g sln L sln oblems 3-6: 3) A solution should be prepared as 3.56 M calcium chloride, CaCl2. Calculate mass (b) of the VOI solute that is needed in order to prepare 3500 mL of the solution. 3.56M CaCl2 mois. -= 12.46mols 3.5L - mol 12.46 molsy 110. agu Imol = 1382.86 11400g (4) A solution is prepared by dissolving 65 g of ethyl alcohol (density=0.78 g/mL)...
A lake with volume 10^3 m^3 is fed by a pollution-free stream with flow rate 5 m^3/min. A factory dumps 0.1 m^3/s of a non-conservative waste with concentration 100 mg/L into the lake. The pollutant has a reaction rate coefficient K of 0.2/day. Assuming the pollutant is well mixed in the lake; find the steady-state concentration of pollutant in lake.
question 2
Part 4C Data Tables: [5 pts.] Lake Alpha: Please record the data indicated for the three titrations of 50.0 mL of Lake Alpha Water and 20 drops methyl red indicator using the 0.0180 M sulfuric acid titrant. Calculate the "Volume of Titrant Used. Use correct significant figures TRIAL # VOLUME OF TITRANT USED TUIN INITIAL VOLUME FINAL VOLUME OF TITRANT OF TITRANT Oom 1814ML OoomL 1813ML Oom 18:2m. Average Volume of Titrant Used 18.4mL 18. 3ML 1812mL 13.35...
5. What is the osmolarity of a solution of 40 g/L Nagu (40.00 g/mole)? 6. A saline solution has an osmolarity of 0.996 OsM. What is the milliosmolarity of this solution? 7. How much 100% reagent is required to make 250 mL of 1X reagent? 8. 8. The concentration of a 1/50 dilution is 0.50 g/L. What is the starting concentration? 9. 9. How much 50 mg/dl solution is required to make 100 mL of 5 mg/dl solution? 10. 10....
Most questions answered within 3 hours.
-
Which of the following design considerations leads to more
user-friendly presentation layers for GUIs? [Check all...
asked 35 minutes ago -
38%
of adults say cashews are their favorite kind of nut. You
randomly select 12 adults...
asked 2 hours ago -
Notational Inc. is considering installing a new server. The
machine costs $100,000 and is expected to...
asked 2 hours ago -
Given the information coding of DNA strand:
5'-TTT-TAC-GAA-GAG-TGA-3',
Write the corresponding DNA template and mRNA strand...
asked 3 hours ago -
2. Boris recently synthesized an explosive compound he named
Badenoughium. The molecular formula for Bdenoughium is...
asked 6 hours ago -
5. A car decelerate evenly from a velocity of 50mph until rest
in a distance of...
asked 6 hours ago -
IN HTML Programming
1. Write a script that inputs integers (one at a time) and
passes...
asked 7 hours ago -
A dentist uses a mirror to examine a tooth that is 0.75 cm in
front of...
asked 7 hours ago -
You set up a 100,000 line of credit for the business on 1/1/X8,
annual interest is...
asked 7 hours ago -
What is the measurement uncertainty of a pan balance? How did you
get that?
asked 7 hours ago -
Suppose four firms have market shares of 30%, 30%, 20% and 20%.
What is the Herfindahl-Hirschman...
asked 7 hours ago -
IBT Industrial Solutions produces forty units of rack and pinion
type steering gears during an eight...
asked 7 hours ago