The ratio of the number of molecules of 4g of hydrogen to that of 32g of oxygen is ?

Can you guys me with question no. 5!

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.

What three things determine the shape and size of a puddle when water is poured out onto a surface