PLEASE HEL...If you have a mass of 70 kg and you are standing on a platform 8 m above the ground, what is your gravitational potential energy?

Alarge marble is dropped in a graduated cylinder with 35ml of water in it.the water level increases to 49ml.what is the volume of the marble

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

Classify this reaction: 2al+n2-> aln.