How many grams of dry NH4Cl need to be added to 2. 00 L of a 0. 100 mol Lâ’1 solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8. 56? Kb for ammonia is 1. 8Ă—10â’5.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?

Listenbase your answer to the question on the information below.nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body.cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment.which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these