What is the potential energy of a rock with a mass of 10 kg while sitting on a cliff that is 15 m high

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

How do you lengthen a pattern piece? (family and consumer science, sewing)