In electroplating, how should the object that will be plated be connected in the electrolytic cell?
It should be the cathode, where metal atoms are reduced to metal ions.
It should be the cathode, where metal ions are reduced to metal atoms.
It should be the anode, where metal atoms are oxidized to metal ions.
It should be the anode, where metal ions are oxidized to metal atoms.

What is the relation between concentration of reactants and the rate of chemical reaction?

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]