5) Samantha added 125 mL of water to 100mL of a stock solution to make
225 mL of a 0.75 M solution. What was the molarity of the original stock
solution?
O 1.7 M.
O 0.3 M
O 0.75 M
O 3M

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?