4. An atom has two electrons with principal quantum number (n) = 1, eight
electrons with principal quantum number (n) = 2 and seven electrons with
principal quantum number (n) = 3. From these data, supply the following values
(if insufficient information is given, say so) in the following order: mass number;
atomic number, electron configuration. Separate your answers with a semi-
colon. (Enter electron configuration as 1s2 2s2 etc.) *

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.