Consider the following cell reaction for a generic cell that has a standard cell potential of 0.757 V: X(s) + Y2+ (aq, 0.500 M) → Y(s) + X2+(aq, 0.0100 M) Calculate the cell potential for this cell at 25°C.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!