Three 8−L flasks, fixed with pressure gauges and small valves, each contain 6 g of gas at 279 K. Flask A contains He, flask B contains CH4, and flask C contains H2. Rank the flask contents in terms of:

Compare and contrast physical changes with chemical changes.

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.