Cefalexin mixture is prepared by adding 38 ml of water and 33 grams of cefalexin granules in a bottle. A mixture that ha...
Cefalexin mixture is prepared by adding 38 ml of water and 33 grams of cefalexin granules in a bottle. A mixture that has been developed has a volume of 60 ml and its concentration (cefalexin) is 50 mg/ml.
1) Calculate the concentration of cexalexin granules (%) (m/m).
2) Same granules are used in a package that has a mixture volume of 100 ml. How much granules are in this bottle? How much water is added?
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Cefalexin mixture is prepared by adding 38 ml of water and 33 grams of cefalexin granules in a bottle. A mixture that ha...
33) If 100. mL of water is added to 25 mL of 5.0 M NaCl solution,...
33) If 100. mL of water is added to 25 mL of 5.0 M NaCl solution, what is the final concentration? 34) Calculate the volume of 0.123 M AgNO3(aq) needed to form 0.657 g of Ag2SO4(s) according to the chemical equation: 2AgNO3(aq) + H2SO4(aq) -----> Ag2SO4(s) + 2H20(1). 35) Calculate the concentration of a KCl solution prepared by adding 200. mL of water to 100 mL of 12% KCl solution.
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water...
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water to make 2000 mL of solution What is the % (m/V) of this solution? b. What volume in ml. of this solution would contain 0.0735 g of glucose? c. How many grams of glucose would be present in 185 ml of this solution? d. How many moles of glucose would be present in 49.7mL of this solution? e. If the density of the solution...
TReferencer A solution is prepared by adding 49.9 ml concentrated hydrochloric acid and 19.7 ml concentrated...
TReferencer A solution is prepared by adding 49.9 ml concentrated hydrochloric acid and 19.7 ml concentrated nitric acid to 300 ml water More water is added until the final volume is 1.00 L. Calculate H".COH)and the pH for this solution. (Hint: Concentrated HCl is 38% HCI (by mass) and has a density of 1.19 g ml., concentrated HNO, is 70% HNO, (by mass) and has a density of 1.42 g/mL.] OH")= M pH-
QUESTION1 A 15-mL sample is added to à 300-ml 8OD bottle. Dilution water is added to the sample bottle and the initi...
QUESTION1 A 15-mL sample is added to à 300-ml 8OD bottle. Dilution water is added to the sample bottle and the initial dissoved axygen concentration is measured as 8.5 mg/L. After the sample is sealed, the laboratory incorrectly takes a measurement of dissolved oxygen reading on day 6 of 3 mg/L. If the BOD reaction rate coefticient for the sample is 0.30/day, estimate what the 5-day BOD should have been QUESTION 2 A 15-mL sample is added to a 300-mL...
If a mixture was prepared by diluting 7.0 mL of the Blue#1 solution with water to...
If a mixture was prepared by diluting 7.0 mL of the Blue#1 solution with water to a final volume of 10.0 mL and mixing this with 2.0 mL of diluted bleach how many seconds would it require for the mixture to have an absorbance of 0.120? Use your measured values of eb and of the average rate constant, k to answer this question. Show all work. eb= 0.1138 k= -0.035 first order reaction Concentration of Blue Solution= 15 M
A stock solution of Na_2S_2O_3 is prepared by adding 20.40 grams of solid Na_2S_2 O_3 to...
A stock solution of Na_2S_2O_3 is prepared by adding 20.40 grams of solid Na_2S_2 O_3 to enough water to make 250.0 ml of solution. A 25.0 ml sample of that stock solution is then diluted to a final volume of 500.0 ml. What is the concentration of sodium ions in the resulting solution (in mol/L)?
35) Calculate the concentration of a KCl solution prepared by adding 200 mL of water to...
35) Calculate the concentration of a KCl solution prepared by adding 200 mL of water to 100. mL of 12% KCl solution.
The Morality(m) of a solution prepared by adding 45. grams of glucose, C6H1206 to water to...
The Morality(m) of a solution prepared by adding 45. grams of glucose, C6H1206 to water to make 250 mL of glucose solution? 0.50M 0.25M 0.10 M 0.35 M
A solution is prepared by adding 0.5630 g of powdered milk into a 2.5E+02 mL volumetric flask and adding 30 mL of 1.0 M...
A solution is prepared by adding 0.5630 g of powdered milk into a 2.5E+02 mL volumetric flask and adding 30 mL of 1.0 M KCL and diluting to volume with DI water. The concentration of a milk sample is determined to be 6.420×10-4 M Ca2+ based on linear regression analysis of calcium standard solutions. What is the concentration of Ca2+ in the milk sample (wt/wt %)? [MW Ca = 40.078 g/mole]
7. At 60oC, NaNO3 has a solubility of 110 grams NaNO3 per 100 grams of water....
7. At 60oC, NaNO3 has a solubility of 110 grams NaNO3 per 100 grams of water. How many grams of NaNO3 are needed to prepare a saturated solution using 50. grams of water? 9. To what volume would you dilute 250.0 mL of a 0.4500 M NaOH solution to obtain a 0.2700 M solution? 10. How many grams of NaNO3 are needed to prepare a 95.00 mL solution that is 9.5% (m/v)? 11. A 140.0 mL sample of a 0.85...
33) If 100. mL of water is added to 25 mL of 5.0 M NaCl solution, what is the final concentration? 34) Calculate the volume of 0.123 M AgNO3(aq) needed to form 0.657 g of Ag2SO4(s) according to the chemical equation: 2AgNO3(aq) + H2SO4(aq) -----> Ag2SO4(s) + 2H20(1). 35) Calculate the concentration of a KCl solution prepared by adding 200. mL of water to 100 mL of 12% KCl solution.
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water to make 2000 mL of solution What is the % (m/V) of this solution? b. What volume in ml. of this solution would contain 0.0735 g of glucose? c. How many grams of glucose would be present in 185 ml of this solution? d. How many moles of glucose would be present in 49.7mL of this solution? e. If the density of the solution...
TReferencer A solution is prepared by adding 49.9 ml concentrated hydrochloric acid and 19.7 ml concentrated nitric acid to 300 ml water More water is added until the final volume is 1.00 L. Calculate H".COH)and the pH for this solution. (Hint: Concentrated HCl is 38% HCI (by mass) and has a density of 1.19 g ml., concentrated HNO, is 70% HNO, (by mass) and has a density of 1.42 g/mL.] OH")= M pH-
QUESTION1 A 15-mL sample is added to à 300-ml 8OD bottle. Dilution water is added to the sample bottle and the initial dissoved axygen concentration is measured as 8.5 mg/L. After the sample is sealed, the laboratory incorrectly takes a measurement of dissolved oxygen reading on day 6 of 3 mg/L. If the BOD reaction rate coefticient for the sample is 0.30/day, estimate what the 5-day BOD should have been QUESTION 2 A 15-mL sample is added to a 300-mL...
A stock solution of Na_2S_2O_3 is prepared by adding 20.40 grams of solid Na_2S_2 O_3 to enough water to make 250.0 ml of solution. A 25.0 ml sample of that stock solution is then diluted to a final volume of 500.0 ml. What is the concentration of sodium ions in the resulting solution (in mol/L)?
35) Calculate the concentration of a KCl solution prepared by adding 200 mL of water to 100. mL of 12% KCl solution.
The Morality(m) of a solution prepared by adding 45. grams of glucose, C6H1206 to water to make 250 mL of glucose solution? 0.50M 0.25M 0.10 M 0.35 M
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