What must happen to an atom of magnesium in order to become a magnesium ion Mg+2?

18. The pressure of moving air is called.

Use the following key to classify each of the elements below in its elemental form: A. Discrete atoms ... C. Metallic lattice B. Molecules ... D. Extended, three-dimensional network 1. Krypton 2. Argon ... 3. Phosphorus 4. Nitrogen ...

Which of the following processes will determine the number of moles in a sample? Dividing the mass of the sample by Avogadro's number Multiplying the mass of the sample by Avogadro's number Dividing the number of molecules in the sample by

What does it mean to say that the electric current from a wall socket is "120 V AC"?

What is the name of NaHSO4 (s) ? Select one: a. sodium sulphate b. sodium hydrogen sulphate c. monosodium bisulphate d. sodium hydrogen sulphur tetraoxide

Which of the following reactions are redox reactions? a. Al (s) + 3Ag + (aq) →Al3 + (aq) + 3Ag (s) b. SO3 (g) + H2O (l) →H2SO4 (aq) c. Ba (s) + Cl2 (g) →BaCl2 (s) d. Mg (s) + Br2 (l) →MgBr2 (s)

How many liters of water are required to dissolve 1.00 g of barium chromate? express your answer in liters to three significant figures?

Cartography is the science of

If a sample of gas occupies 400 ml at a pressure of 800 mm Hg, what will be it's volume if the pressure is reduced to 700 mm Hg

Why are water storage tanks usually built on towers or hilltops?