how many protons, neutrons, and electrons does rubidium-87 contain? *

a) 87 protons, 85.5 neutrons, 87 electrons

b) 37 protons, 37 neutrons, 37 electrons

c) 37 protons, 87 neutrons, 37 electrons

d) 37 protons, 40 neutrons, 37 electrons

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.

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?