Warm air rises because faster moving molecules tend to move to regions of less A) density.
B) pressure.
C) both of these
D) none of the above

How to tell if a molecule is polar or nonpolar with electronegativity

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87