A mixture of gases contains 1. 50 mol of o2, 0. 75 mol of he, and 2. 25 mol of n2. The total pressure exerted by the mixture is equal to 2. 50 atm. What is the partial pressure of the he?.

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.

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

Afamily is one another name for a group on the table of elements.