Chemistry, 14.06.2020 00:57 Weirddobby3964
Suppose you want to create a 6 ng/μL solution in a 25 mL volumetric flask. However, this concentration cannot really be accurately prepared in a single step due to the small amount of mass that would need to be measured. Therefore, you decided to conduct this as a two step process. You will create a high concentration stock solution in one 10 mL flask. You then transfer 0.1 mL into a second 25 mL volumetric flask that will be the concentration of 6 ng/μL. What is the mass of chemical you need to add to the stock flask to achieve the desired concentration after dilution?
Answers: 1
Chemistry, 21.06.2019 14:00
Your answer should have the same number or significant figures as a he starting measurement. 3201 ml =
Answers: 2
Chemistry, 22.06.2019 00:30
Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.
Answers: 1
Chemistry, 22.06.2019 01:30
If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)
Answers: 3
Chemistry, 22.06.2019 04:20
Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from
Answers: 1
Suppose you want to create a 6 ng/μL solution in a 25 mL volumetric flask. However, this concentrati...
History, 25.02.2022 14:00
Chemistry, 25.02.2022 14:00
Mathematics, 25.02.2022 14:00
English, 25.02.2022 14:00
History, 25.02.2022 14:00
Mathematics, 25.02.2022 14:10
History, 25.02.2022 14:10
Mathematics, 25.02.2022 14:10