Reference no: EM132782511

1) You have 10 mL of a 2 M stock solution of NaCl. What volume of NaCl stock would you have to use to make 500 μL of 100 mM NaCl? Choose final units that will let you express the answer as an integer between 1 and 999. Include your units in your answer.

2) (You are growing a bacterium that requires the amino acid arginine for growth. You create growth medium by adding 10 mL of sterile 50 mM arginine to 50 mL of LB broth. You will solve for the final concentration of arginine in the solution)
Choose final units that will let you express the answer as a number between 1 and 999. Include one decimal place. Include your units in your answer.

3) After 24 hours of incubation, you observe 200 colonies present on an LB plate onto which you had previously spread 50 μL of a cell suspension. What is the concentration of the cell suspension? Include your units in your answer.