Author Question: A mole of oxygen (O2 ) molecules and a mole of carbon dioxide (CO2 ) molecules at the same ... (Read 154 times)

Chelseaamend · **on:** Jul 29, 2018

A mole of oxygen (O2 ) molecules and a mole of carbon dioxide (CO2 ) molecules at the same temperature and pressure have

A) the same number of atoms.
B) different average kinetic energy per molecule.
C) the same number of molecules.
D) the same average molecular speeds.
E) different volumes.

Question 2

An ideal parallel-plate capacitor consists of a set of two parallel plates of area A separated by a very small distance d. When the capacitor plates carry charges +Q and -Q, the capacitor stores energy U0.

If the separation between the plates is doubled, how much electrical energy is stored in the capacitor? A) 4U0
B) 2U0
C) U0
D) U0/2
E) U0/4