Four consecutive absorption lines in the pure rotational spectrum of gaseous 1h35cl are found to have the frequen- cies 2.50 × 1012, 3.12 × 1012, 3.74 × 1012, and 4.37 × 1012 s21.

calculate:

(a) the moment of inertia i of hcl (in kg m2)

(b) the energies of the j 5 1, j 5 2, and j 5 3 rotational levels of hcl, measured from the j 5 0 state (in joules)

(c) the hucl bond length (in angstroms)

(d) the initial and final j states for the observed absorp- tion lines

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

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.