Suppose the temperature of 4.39 L of ideal gas drops from 381 K to 275 K. (a) If the volume remains constant and the initial pressure is atmospheric pressure, find the final pressure.

(b) Find the number of moles of gas.

What is avogadro’s number, and why is it useful

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?