Aclosed tank contains 20 lb of water. if 300 btu are added to the water, what is the change in internal energy of the water?

Asolution of sodium hydroxide was titrated against a solution of sulfuric acid. how many moles of sodium hydroxide would react with 1 mole of sulfuric acid?

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

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?