alculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume the sample has a density of 1.00 g/mL. Show your work for full credits
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Q: Calculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg…
A: Given :- mass of Cd in sample = 16.4 μg Volume of sample = 2.00 mL…
Calculate the concentration in ppm of Cd in a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume the sample has a density of 1.00 g/mL. Show your work for full credits (just explain step by step and put the answer at the end)
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- STANDARD SAMPLE PREPARATIONS FOR ABSORBANCE & CONCENTRATION DATA Concentration of stock nickel sulfate hexahydrate solution = .400 Molarity Sample Volume Absorbance Concentration (In Molarity) a 5 mL .179 10 mL .329 15 mL .588 20 mL .760 25 mL .939 Reference Blank = 0 Please show how to find Molarity, please show steps. Thank you and stay safe.Dr. TS You found lead in blood collected from children living within 5 km from the Ship Channel. Calculate weighted average lead concentration (mg/L) in their blood. Age group (n) Average lead concentration (1ug/dL) 25 1-2 years (30) 3-4 years (50) 5-6 years (50) 7-8 years (40) 9-10 years (60) 30 35 40 40Results: Part 1: Sensor reading Solution Step Initial Vol (ml) Final Vol (ml) Molarity Moles of Solute preparation 500 ml 500 ml 0.680 mol/L dilution 500 ml 700 ml 0.478 mol/L draining 700 ml |400 ml 0.478 mol/L evaporation 400 ml 250 ml 0.710 mol/L
- Sea X Assignments: ANATO X Gi 0220907135028396%20(1).pdf 2 CD Page view Human Anatomy X A Read aloud *20220907135028396 X TAdd text Draw 4 You prepare four solutions: Solution 1: Reactants + enzyme at #0 (about 100°F) and pH 7 Chemistry Check your recall lab. x V Highlight UNIT 2 65 3 Decompression sickness (also known as the bends) is a condition that affects divers and others operating under pressurized conditions. It occurs when gases such as nitrogen (N₂) come out of solution in the blood. This can lead to symptoms including joint pain, shortness of breath, and paralysis. Severe cases may result in death. a What type of molecule (ionic, polar covalent, nonpolar covalent) is nitrogen gas? b The liquid medium of blood is water. What type of compound (ionic, polar covalent, nonpolar covalent) is water? c What happens when molecules such as nitrogen gas mix with water? How does this explain the problems we see with decompression sickness?Please help me fill in the highlighted. I don't know. Please explain how to get the answers. Thank you in advance.1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)pls compelete the 2nd table given the data
- Consider four distinct physical properties: boiling point, melting point, solubility, and density. Which of these physical properties do you think allows thin layer chromatography (TLC) to work? Choose one then, explain your reasoning.4. To set up your seed assay, you’ll conduct serial dilutions of a fuel derived from a renewable feedstock. To begin, you’ll make 20 mL of a 10% solution of your assigned fuel. a. How many grams of fuel will you need to make your solution? Hint: The definition of a 10% solution is 10 grams of solute (fuel in this case) in 100 mL of solution. b. You will then pour 10 mL of your 10% solution into an empty beaker. How much water (in mL) should you add to the beaker to create a 5% solution? Hint: Assume all of your fuel is completely dissolved and the volumes of the solutions are additive.1. A company illegally dumped their wastewater on a river bank. You are part of an environmental NGO that are tasked to determine what kind toxins that may have contaminated the waters. What kind of analysis would you do? a. Characterization analysis b. Qualitative analysis c. Fundamental analysis d. Quantitative analysis 2. Four groups weighed ten rock samples each, and tested the possibility of outliers using Q-test. At 95.0% confidence (a = 0.05), which of the following is considered to be an outlier? a. 0.024 b. 0.413 c. 0.453 d. 0.674 3. An unknown solution containing oxalic acid, which is a diprotic acid, is titrated against sodium hydroxide. How many mole/s of titrant is needed to react with one mole of analyte? a. ½ b. ¼ c. 2 d. 4
- A solution consists of 35.00 g of Cuso, dissolved in 250.0 mL of water. The molar mass of Cu is 63.55 %/mol, the molar mass of S is 32.07 %/mol, and the molar mass of O is 16.00 %/mol. What is the molarity of the solution? Show your work. a N + PENCIL THIN BLACK3. The Maximum Acceptable Concentration (MAC) of Pb in drinking water is 10 ppb. If a sample hasconcentration of 65 nM, what will be the concentration in ppb and does it exceed the MAC?a. 8 ppb, no it didn’t exceed the MACb. 9 ppb, no it didn’t exceed the MACc. 12 ppb, yes it exceeds the MACd. 13 ppb, yes it exceeds the MACDissolution Distilled H20 Concentration 0.01 M HCI Concentration (mg/ml) Time Total amount A Total amount A (mg/ml) (mg) (mg) 5 0.16 0.1 10 0.24 0.18 15 0.35 0.25 20 0.48 0.34 25 0.58 0.4 30 0.67 0.5 1. Plot the given data on an ordinary paper and find the slope for each line then calculate the IDR constant for aspirin in the two dissolution media, water and HCI. NOTE: Slope of the calibration curve = 1.0 (mg/ml and saturation solubility of salicylic acid is equal to 2.0 gm/L.