Hydrofluoric acid is an extremely strong acid with a pH of 2.1. What is the chemical formula for the reaction between hydrogen and fluorine to make hydrofluoric acid?a. HFb. H2Fc. HF2d. H2F3

Why are the trends and exceptions to the trends in ionization energy observed?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

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.