A 20.0 L gas at 1.00 atm and 22.0 degree Celsius expands to a volume of 30.0 L at 30.0 degree Celsius. What is the pressure of the gas

Matches the chemical name of each oxide of phosphorus to its chemical formula

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

The identities of substances are the same before and after which type of change