A calorimeter contains 0.50kg of water at 15°C. A 0.040kg block of zinc at 115°C is placed in the water. What is the final temperature of the system?

What are atoms of the same element with varying number of neutrons

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

The air that we breath is made mostly of which gaseous molecule