Which event is a chemical change? O a) The paint cracks and chips,
O b) The roof
the car dents
Oc) The baseball strikes the roof.
O d) The exposed metal rusts.

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

In which situation can a mixture always be called a solution

Why are pipes bursting in the in extremely cold weather?