Which of the following substances should you use to make a pH 7.0 buffer? Part A
C3H NH* (pKg = 5.2)
None of these options are correct.
OHCrO4 (pka = 6.5)
C4H4ONH2* (pkg = 8.5)
H202 (pka = 11.7)
HCN (pKa = 9.2)

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.

In apex! a liquid heated beyond a certain temperature becomes

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.