Which of these boxes (x, y,z) has the least mass?

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Positrons are spontaneously emitted from the nuclei of