What happens to the density of an object when the volume of that object increases and the mass remains the same? HEL M

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

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

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest