If a gold bar has a volume of 722 cm^3 and its initial temperature is 23.1 C and is heated to 93.4 C, what is the energy in kJ? (The density of gold is 19.3 g/cm and a specific heat of .129 J/gC)

Why are pipes bursting in the in extremely cold weather?

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures