Classify the type of reaction: Mg + Cu(NO3)2 + Mg(NO3)2 + Cu
O Combustion
O Synthesis
O Double Replacement
O Single Replacement

Calculate the number of molecules present in 0.750 mol of mgo.

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.

Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.