A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 77.51 pg. What is the total mass in micrograms of cofactor A in a yeast colony containing 10^5 cells? Write your answer as a decimal.

Can someone me with questions 15 to 17 plz.

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.