Explain the electroplating of copper plate and iron spoon that use copper (II) sulphate ?​

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves