Jamal heats a metal rod to 75oc and drops it into a bucket of tap water. how does the motion of the water molecules change as a result?
a) the water molecules do not change.
b) the water molecules move and vibrate faster.
c) the water molecules move and vibrate slower.
d) the water molecules cling to the metal and freeze.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present