Hot coffee in a mug cools over time and the mug warms up. Which describes the energy in this system
The average kinetic energy of the particles in the mug decreases.
The average kinetic energy of the particles in the coffee increases.
Thermal energy from the mug is transferred to the coffee.
Thermal energy from the coffee is transferred to the mug.

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.