What happens to the particles when a pure substance melts

A volleyball is full of pressurized air. The air temperature is 24.6˚C. The volleyball's absolute pressure is 130.75 kilopascals, and its volume is 5.27 liters. How many moles of air are inside the volleyball? A. 0.278 mol B. 3.37 mol C. 3.59 mol D.

How to tell the ionization energy of atoms

How can you increase the gravitational potential energy between yourself and the earth?

If the mass is 18.83 and the density is 0.922, what's the volume?

Which best describes an element? a. a pure substance b. a type of mixture c. a pure compound d. an impure substance

How can equilibrium of a closed system chemical reaction be disturbed? Select all that apply. Adding or removing products or reactants. Keeping the concentration of products and reactants the same. Keeping the temperature of the system constant.

Why does an exothermic reaction need activation energy?

The temperature of 15 grams of water increases by 3.0 degress. how much heat was absorbed by water?

What are the four types of stoichiometry problems?

100 ml oxygen at 1.75 atm and 200ml nitrogen at 0.6 atm are passed to a 500 ml vessel. Calculate the total pressure of the mixture in the vessel at same temperature