A sample of N2 gas (2.0 m mole) effused through a pinhole in 5.5 sec. It will take s for the same amount to CH4 to effuse unde the same conditions.

An occluded front moves over the farmland that has been experiencing drought conditions. what change in weather will this front likely bring? a. gray skies, but no rain b. an extended period of rain c. more dry air and sunny skies d. violent, short-lived thunderstorms

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

What was bohr’s contribution to the planetary model