A solution UV transmittance is 35% at 260nm. Calculate the transmittance if you dilute 25mL of the solution to 75.0 mL.
A solution UV transmittance is 35% at 260nm. Calculate the transmittance if you dilute 25mL of...
if the transmittance of a solution was found to be 35% what is the transmittance if the solution was diluted to half?
To what volume should you dilute 35 mL of a 13 M stock HCl solution to obtain a 0.580 M HCl solution?
To what volume should you dilute 35 mL of a 11 M stock HCl solution to obtain a 0.540 M HCl solution? Express your answer using two significant figures.
Question 1: In the laboratory you dilute 3.33 mL of a concentrated 6.00 M hydrochloric acid solution to a total volume of 75.0 mL. What is the concentration of the dilute solution? M Question 2: You wish to make a 0.153 M hydroiodic acid solution from a stock solution of 3.00 M hydroiodic acid. How much concentrated acid must you add to obtain a total volume of 100 mL of the dilute solution? mL Thank-you!
please helps with 4-7
mp Delweer dusurance and transmittance? 4) You read the % transmittance on a spectrophotometer to be 25.8%, which means 25.8% of the initial light created has made it through your sample to the light detector. What is the absorbance value for 25.8% Transmittance? 5) What is the molar mass of FDC40 (Red Dye #40)? 6) If you had a 0.125 g/L solution of FDC40, what would the molarity of the solution be? 7) If you took...
1b. You wish to make a 0.395 M perchloric acid solution from a stock solution of 3.00 M perchloric acid. How much concentrated acid must you add to obtain a total volume of 75.0 mL of the dilute solution? 1c. In the laboratory you dilute 4.36 mL of a concentrated 12.0 M perchloric acid solution to a total volume of 50.0 mL. What is the concentration of the dilute solution?
A stock solution of NiBr2 is available to prepare solutions that are more dilute. Calculate the volume, in mL, of a 2.0-M solution of NiBr2 required to prepare exactly 250 mL of a 0.640-M solution of NiBr2
A stock solution of MgCrO4 is available to prepare solutions that are more dilute. Calculate the volume, in mL, of a 2.0-M solution of MgCrO4 required to prepare exactly 250mL of a 0.510-M solution of MgCrO4. _____ mL? A solution is made by dissolving 19.6 g of iron(II) bromide, FeBr2, in enough water to make exactly 500 mL of solution. Calculate the concentration (molarity) of FeBr2 in mol/L (M). _____ M FeBr2 Calculate the mass, in grams, of CoBr2 required...
If the volume of DNA solution was 0.5 mL, calculate the yield if: (a) the Absorbance reading at 260nm from a 1:100 dilution = 0.459 (b) the Absorbance reading at 260nm from a 1:100 dilution = 0.167 Show workings
1. You are given 15 ml of a 45% solution and told to add (not dilute to) 175 ml. What will the final strength of the diluted solution be? 2. You need to make a 10% solution using 4 ml of a 70% stock solution. How much sterile saline do you need to add to make this product? 3. You are given 5 ml of a 65% solution. If you dilute the solution to make a 15% solution, what is...