he concentration of PSA (prostate-specific antigen) in the blood is sometimes used as a screening test for possible prostate cancer in men. The value is normally reported as the number of nanograms of PSA per milliliter of blood. A PSA concentration of 1.7 ng/mL1.7 ng/mL is considered low. Express that value in terms of the units shown.   PSA=         g/L PSA=        kg/m3 PSA=        mg/L

Q: A table salt solution with Density of 1.0513 g/L. Calculate the ff. A. Salinity (as g/Kg NaCl) B.…

A:

Q: Insulin is a protein that is used by the body to regulate both carbohydrates and fat metabolism. A…

A: Given: Concentration of insulin = 30.0 mg/mL. And volume of insulin solution = 275 mL.

Q: A 3.40 M aqueous solution of LiCI has a density of 1.0758 g/mL. If the total mass of the solution is…

A: given molarity = 3.40M mass of solution = 59 g density of solution = 1.0758 g/ml

Q: 1. What is the normality of a solution that contains 2.5 grams of Na:S2O3.5H2O in 500 ml water?

A: Normality is defined as the gram equivalent weight of solute dissolved in one liter of solution.…

Q: How many grams of sucrose are needed to make 915 mL of a 32.0% (w/v) sucrose solution? mass:   g…

A:

Q: Chlorine is used to disinfect swimming pools. The accepted concentration for this purpose is 1 ppm…

A: Given : Mass of water in swimming pool = 8.45 X 104 gallons  Mass percent of chlorine = 6.00 %  And…

Q: A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that…

A: Given  Volume of solvent ( water ) = 50 ml Density of water = 1 g/ml Freezing point of pure solvent…

Q: A 2.700x10-2 M solution of glycerol (C3H§O3) in water is at 20.0° C. The sample was created by…

A:

Q: A venti pour Blonde Roast coffee from Starbucks contains 232 mg of Caffeine (C8H10N4O2) per 20.0…

A: Given ,          mass of caffeine=232 mg=0.232 g        volume of solution-20.0 fluid ounces

Q: A chemistry student weighs out 45. g of an unknown solid compound X and adds it to 750. mL of disti…

A:

Q: At a certain temperature, an aqueous solution is 16.5% K2CO3 by mass and has a density of 1.149…

A: Given: density of solution = 1.149 g/cm3 Molar mass of K2CO3 = 138.205 g/mol Mass percent of…

Q: A chemistry student weighs out 0.184 g of phosphoric acid (H, PO a triprotic acid, into a 250. ml.…

A: Given data,Mass of H3PO4=0.184gVolume of water=250mL=0.250LMolarity of NaOH=0.1400M

Q: In the standardization of an acid and base solution, sodium hydroxide (99.5% by mass) was used. A…

A: Given: initial burette reading=5.5mL final burette reading=28mL Weight of the sample=0.12g To find:…

Q: 7. Calculate the volume of pure isopropanol in the 50 mL you measured, using the %. Recall that a %…

A:

Q: A sample of air, with a mass of 5.0 kg, contained carbon monoxide with a concentration of 12 parts…

A: We have given that  A sample of air with a mass of 5.0 kg, contained carbon monoxide with a…

Q: A 6.9 M KOH solution in water has 30% by weight of KOH. What is density of KOH in g/mL

A: Given: Molarity of KOH solution = 6.9 M Weight % of KOH = 30% Molar mass of KOH = 56 g/mol

Q: Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person…

A: Solution :       The molarity of the solution is defined as the number of moles of solute dissolved…

Q: 6. Suppose you start with 100 mL of a 5% (5g/dL) sucrose solution and dilute it by adding 300 mL of…

A: The question is based on the concept of mass percentage.   amount of substance present in hundred…

Q: A chemist makes 640.mL of mercury(II) iodide HgI2 working solution by adding distilled water to…

A: When a solution of Molarity M1  and volume V1 is diluted by adding water to a final volume V2  and…

Q: The volume of seawater on Earth is about 3.3 x 108 mi3. If seawater is 3.5% sodium chloride by mass…

A:

Q: A solution of formic acid , HCHO2 is 23.6 M and has a density of of 1.20 g /mL. What is the…

A:

Q: A chemist makes 710.mL of mercury(I) chloride Hg2Cl2 working solution by adding distilled water to…

A:

Q: Average Water Hardness (mg CaCO, / ml water sample) Average Water Hardness (mg CaCO3 / L water…

A: Given the hardness of water sample (from three trials), average value can be calculated.

Q: A solution is made by mixing 5.40 g of toluene, CHg(1), with 954. mL of chloroform, CHCI3(1).…

A:

Q: Fluoridation is the process of adding fluorine compounds to the drinking water. Fluoridated water…

A:

Q: Chlorine is used to disinfect swimming pools. The accepted concentration for this purpose is 1 ppm…

A: The mass of water in the pool is calculated as,

Q: Rimantadine HCl syrup contains 2.4 g of rimantadine HCl in each 240 mL of syrup. How many milligrams…

A: Given data :- Amount of rimantadine HCl  in 240 mL of syrup =  2.4 g

Q: Calculate the density of 50.0 g of an isopropyl alcohol–water mixture (commercial rubbing alcohol)…

A: Density is the measurement of mass per unit volume. To calculate the density, the amount of mass of…

Q: A chemistry student weighs out 0.0775 g of phosphoric acid (H₂PO4), a triprotic acid, into a 250. mL…

A: Given -> Weight of H3PO4 = 0.0775 gm Volume of H3PO4= 250 ml = 0.250 L (1L = 1000ml) Molarity of…

Q: The bottle labelled “concentrated hydrochloric acid” in the lab contains 12.0 mol of HCl per liter…

A:

Q: A certain organic compound O has a solubility in hexane of 0.780 –- at 10. °C. Calculate the…

A: In this question, we will calculate the greatest mass of organic compound O dissolved in hexane. You…

Q: A chemistry student weighs out 0.0923 g of hypobromous acid (HBRO) into a 250. mL volumetric flask…

A: Given mass of HBrO = 0.0923 g  Volume of HBrO in mL = 250.0 mL  Molarity of NaOH = 0.1400 M…

Q: The minimum level of mercury levels in water considered safe is 1 part per billion (ppb) by weight.…

A: The volume of water is = 8.52 L The concentration of mercury in the water sample is = 0.59 parts per…

Q: What is the meaning of a 25 % (m/m) NaCl solution (Table 8.11) A) 25 mL of NaCl in 100 mL of NaCl…

A: Given : % (m/m) of NaCl = 25 %.

Q: A 98.0 kg patient being treated for leukemia is to receive an IV infusion of 5 mg/kg…

A: Given:  Weight of patient = 98 Kg  IV solution to be injected = 5 mg/Kg Solution prepared = 1g…

Q: Calculate the Normality of Hcl of a solution that contains 45 g in 325 ml of water, knowing that the…

A:

Q: A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that…

A:

Q: A solution is prepared by dissolving 30.0 gg of NaOHNaOH in 126.0 gg of water. The NaOH solution has…

A:

Q: ) An aqueous solution of ethyl alcohol is made by transfering 4.72 mL of liquid ethyl alcohol to a…

A: % v/v = (volume of solute / volume of solution)x100

Q: An acid is dissolved in another acid. Acid has a specific gravity of z.46 and a mass of 50 grams.…

A: 50 grams of acid 1 is dissolved with 50 ml of acid 2 specific gravity of acid 1 is 2.46 g/ml…

Q: 7.What volume (in ml) of a solution that is 23% in glucose(C6H12O6) by mass contains 162.5g of…

A: Given data, 23% glucose solution by mass Density of solution is (d) 1.03 g/ml

Q: Anaesthetic is a used during surgery to cause unconsciousness or a lack of feeling in a part of the…

A: we need to calculate the concentration of the solution in V/V %

Q: The concentration of Tylenol, (CaHNO2), in a patient's plasma is found to be 2.99 x 10 M after the…

A:

Q: The density of a series of solutions with different concentrations of NaCl is measured. The results…

A: Plot of density (g/mL) Vs  concentration (NaCl % by weight)  is given by,

Q: You have a patient who weighs 95 pounds. The dosage of a drug is 1.5 mg drug per kg of body mass.…

A: First we need to understand which unit convention are used in the question and which we want to use…

Q: If a total of 125 mL of a 10% solution is diluted to 500 mL in a 500-mL volumetric flask, what is…

A: 1.) As the initial 10% solution is diluted , so we would use dilution law to calculate concentration…

Q: Average human blood serum contains 18 mg of K+ and 365 mg of Cl- per 100 mL. Calculate The molar…

A: concentration = (no of moles of solute/ volume of solution in ml) × 1000   • pK = -log {K+} • pCl =…

Q: One individual was told that his total blood cholesterol concentration should be less than 200.…

A: The concentration of cholestrol are given in two different units; C1 = 200mg/dL C2 = 5.2 x 10-3M It…

Q: . A patient (60 kg) being treated by a paramedic needs to be intubated, following sedation with…

A: