Pcl5 exist but ncl5 does not. why?

Gas x has a mass of 28.2 amu and gas y has a mass of 32 amu which gas will diffuse faster

What trend does the first ionization energy follow, going down the periodic table? A. The first ionization energy increases because there are more electrons in the atom. O B.

What process is responsible for continually wearing away the Earths surface A. erosion B. faulting C. deposition D. folding 10 pts

An ionic bond results from electrical attraction between

Using the standard reduction potentials listed in appendix e, calculate the equilibrium constant for the reaction at 298 k: 3 ce4 + (aq) + bi (s) + h2o (l) → 3 ce3 + (aq) + bio + (aq) + 2 h + (aq)

A balloon has a volume of 2.5 L and contains 0.100 moles of Helium. Another balloon has a volume of 5.0 L. They are at the same temperature and pressure. How many moles of gas does the second balloon contain?

Why is it important to that the solid be dry before the final mass measurement?

What is 0.00055030 in Scientific form?

What happened to the rate of the forward reaction and the rate of the reverse reaction as time progresses. Describe the rates when the reacion reaches equilibrum.

During which phase of the moon do neap tides occur? O full O gibbous O new quarter