What are families of elements with similar chemical properties called?

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.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Define dew point. i am writing this part to be able to ask the question