*WILL GIVE A BRAINIEST TO THE CORRECT ANSWER & 15 POINTS* A sodium atom has the following electron configuration: 2-7-1-1. This is the excited state because the electron is moving from

A.) 4th shell to 2nd shell
B.) 2nd shell to 4th shell
C.) 3rd shell to 2nd shell
D.) 2nd shell to 3rd shell

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2:

What is true for a substance that releases energy