I)Write the chemical formulae of following compounds. a. Magnesium chloride b. Potassium oxide

ii) Balance the following chemical equations.

a. Mg + O2 --->MgO

b. Ca + HCl--->CaCl2 + H2

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Why are pipes bursting in the in extremely cold weather?

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2