Solve v/v and W/v solution calculations
Calculate the mass of CaCl2 required to make 161mL of a 20% CaCl2 solution. Record to the first decimal point.
32.2
A technician asks you to prepare a dilution of a laboratory disinfectant. The label says that a 2:14 dilution in water is required before use. Calculate the volume of disinfectant in mL required to make 0.42
52.5
During a pilot run of vaccines vials, the quality control teams inspected 30 vials per day over five days, for total of 100 vials. The number of defects recorded each day was as follows ; 1,2,4,7, and 9 using the standard deviation formula calculate the standard deviation of defects data. Record your answer to two decimal places.
3.36
Put the number in scientific notation. 1.912
10^4x0.0001912
Calculate the mass of CaCl2 required to make 457mL of a 80% CaCl2 solution. Record to the first decimal point.
465.6g
A technician is preparing a series of 3:4 serial dilutions starting with a solution concentration of 8.0m. What is the molarity of the solution after 3 serial dilutions. Record the correct amount rounded to two decimal places.
3.38
During a pilot run of vaccines vials, the quality control teams inspected 7 vials per day over five days, for total of 120 vials. The number of defects recorded each day was as follows ; 8,9,15,17 and 19 using the standard deviation formula calculate the standard deviation of defects data. Record your answer to two decimal places.
4.88
Calculate the volume in mL of 12X TE Buffer required to make 0.0558 L of 1X TE Buffer. Record the correct amount rounded to one decimal place.
4.7mL
A technician is preparing a series of 1:8 serial dilutions starting with a solution concentration of 71M. What is the molarity of the solution after three serial dilutions? Record the correct amount rounded to two decimal places.
0.14
During a clinical trial for a drug, the quality control team inspected 8 patient samples per day over 5 days for a total of 68 patient samples. The number of defects recorded each day was as follows: 6,7,8,9, and 10. Using the standard deviation formula calculate the standard deviation of defects data. Record your answer to two decimal places.
1.58
Calculate the answer and report it with the correct number of significant figures. (3.42×5.6)+1.278
Calculate the mass of agarose needed to make a 19mL of a 9 uL solution agarose solution. Record the answer to one decimal.
1.7
A technician is preparing a series of 4:8 serial dilutions starting with a solution concentration of 193M. What is the molarity of the solution after three serial dilutions? Record the correct amount rounded to two decimal places.
24.13M
During a clinical trial for a drug, the quality control team inspected 10patient samples per day over 7 days for a total of 21 patient samples. The number of defects recorded each day was as follows: 1.8,3.9,2.1,4.2, and 10. Using the standard deviation formula calculate the standard deviation of defects data. Record your answer to two decimal places.
3.31
Calculate the volume in mL of a 2 M NaOH stock solution required to make 450 mL of a 123mM NaOH. Record to one decimal place.
27.7mL
You want to prepare 0.075 L of a Kanamycin solution with a concentration of 25.6 µg/µL. Calculate the mass of Kanamycin in grams, rounded to one decimal place.
1.9g
119.70M
During a clinical trial for a drug, the quality control team inspected 19 patient samples per day over 11 days for a total of 59 patient samples. The number of defects recorded each day was as follows: 9.8,3.7,10.1,7.2, and 19. Using the standard deviation formula calculate the standard deviation of defects data. Record your answer to two decimal places.
5.67
Calculate the volume (in mL) of a 3.5 M NaOH stock solution required to prepare 725 mL of a 185 mM NaOH solution. Record the answer to one decimal place.
38.3