An atom of magnesium has an atomic number of 12 and a mass number of 24. how many protons plus neutrons are in the nucleus

A student is testing water to know which is best foe cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from

31.5 grams of Cl2 is collected over water at 35 C. The volume of the chlorine is 15.0 l when the water levels are equal. What is the barometric pressure? (Pressure should be in torr.)

The stability of an isotope is based on its?

The compound FeCl3 is made of

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

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?

Imagine a chemist is in the lab and trying to make some chemical reactions happen. In one reaction she reacts chemicals in an exothermic reaction and there is an increase in entropy.

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

Type of ion formed by group 2A elements

Identify each energy exchange as heat or work. Drag the appropriate items to their respective bins. melted wax