Which has more particles, a mole of copper (Cu) atoms or a mole of neon
(Ne) atoms?
A.

Impossible to determine
B.

they both are the same

C.
Copper

D. Neon

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?