Why are the elements 57 through 71 and 89 through 102, found separately at the bottom of the table?

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

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.

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?