Calculate the number of moles of molecules on 7.30g of hydrogen chloride HCL​

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

One similarity and one difference between an element and a mixture of elements

What is the formula of the ionic compound composed of calcium cations and chloride anions