In the past, many Canadians used wood
stoves or fireplaces to heat their homes.
Today, most Canadian homes burn oil or
natural gas or use electric heating.
Suggest more than one reason why this
change has occurred.

What is the mass of 8 moles of sodium atoms

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.