The molar heat of fusion for water is 6.01 kj/mol. how much energy must be added to a 75.0-g block of ice at 0°c to change it to 75.0 g of liquid water at 0°c?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

At the current rate, a graph of carbon dioxide produced by fossil fuels over time would slope upward slope downward be horizontal be vertical

Which is an example of a reversible physical change?