Question

Stuart measures 10 grams of water into a pan and freezes it. A day later he takes it out of the freezer and is surprised that it is larger than before he froze it. What is the mass of the ice? (10 grams; 11 grams; 20 grams; 25 grams)

Answer 1

The mass of the ice, after freezing 10 grams of water, will still be 10 grams. The mass does not change during the phase transition from water to ice. The surprising increase in size is due to the fact that ice is less dense than water, resulting in a larger volume but not a larger mass. Therefore, the correct answer is 10 grams.