Check the calculations and pay attention to the unit analysis.
The molecular mass of NADH is 709.43 Da. How many millilitres of a 50 µM solution...
The molecular mass of a protein is 50000 Da. (A) What is the mg/mL concentration of a 40-µM solution of the protein? (B) What is the percentage concentration of this solution?
A given protein solution has a concentration of 5 mg/mL, and the molecular mass of the protein is 25000 Da. (A) What is the molarity [M] of the solution? (B) What volume is needed to make 150 µL at 100 µM?
a) Brandy is 40. % (v/v) ethanol solution. How many millilitres of ethanol are present in 0.750 L of brandy? ( /3) b) How many litres of a 5.0% (m/v) glucose solution would you need to obtain 75 g of glucose? ( /3) c) Calculate the mass percent (m/m) of a solution containing 26 g of potassium carbonate and 724 mL of water? ( /3)
500 mL of a 1 in 10,000 solution of adrenaline is required. How many millilitres of a solution containing 0.7 mg/mL of adrenaline would be needed? I was able to come up with 71.42 but it is not the actual answer. The correct answer is 71 ml Could you please tell me where I went wrong with my calculations? solving for C1xV1= C2XV2 0.1 X 500ml= (ml) X 0.7 solving for V2 = 71.42
For 20mL of a 0.1000 M standard acid solution how many millilitres of a 0.1000 M NaOH solution should be added to reach the equivalence point.
A solution prepared by dissolving 90.0 mg of a sugar (a molecular compound and a nonelectrolyte) in 1.00 g of water froze at -0.930°C. What is the molar mass of this sugar (g/mol)? The value of Kf is 1.86°C/m.
A solution prepared by dissolving 513 mg of a sugar (a molecular compound and a nonelectrolyte) in 1.00 g of water froze at -2.79 °C. What is the molar mass of this sugar? The value of Kf is 1.86°C/m. Answer in g/mol.
7. How many millilitres of 3.50 M NaOH can be prepared from 75.00 pared from 75.00 grams of solid NaOH? 8. A stock solution of 2.00 M CuCl2 is available. What volume of this stock solution is needed to prepare 250.0 mL of a 0.100 M CuCl2 solution? 9. A 4.691 g sample of MgCl2 is dissolved in enough water to give 750 mL of solution. What is the magnesium ion concentration in this solution? A) 3.70 x 10-2 M...
help pelase Calculate the volume in millilitres of a 0.875 M sodium sulfate solution containing 8.90 g of sodium sulfate? Question 19 (8 points) How many g of water should be added to 8.27 g of acetic acid (HC2H302) to give a .175 m aqueous acetic acid solution? Question 20 (8 points) What is the vapor pressure at 35°C of a solution made by dissolving 44.6 g of sucrose, C12H22011, in 62.3 g of water? The vapor pressure of pure...
16. A hydrocarbon with a molecular weight of 100 Da (and expected molecular ion at 100 m 2) was analyzed by mass spectrometry and gave the spectra shown below. Based on the MS spectrum and considering possible fragmentation of the hydrocarbon, which of the molecules provided corresponds to this spectrum? 100- m/z = 57 Da Relative Intensity m/z = 85 Da Expected molecular ion (not observed) 10 20 30 40 tillo el origen los 50 60 70 80 90 100...