What number should be in front of O2 to balance the equation?
4A1+_O2–> A12O3

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

When the water vapor cools it condenses select a number that represents his process on the

In apex! a liquid heated beyond a certain temperature becomes