In an experiment, a sample of CO2 gas was shown to effuse through a pinhole at a rate of 0.033 mol/min (where 1 min = 60 s). Using the same setup, 0.033 mol of a mystery gas effused through the same pinhole in 104 seconds.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?