Compare 51.5 hectograms to 51500 decigrams. how do each of these values compare to a gram, and which represents a larger mass?

What happens to atoms and chemical bonds during a reaction?

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up