14. The masses listed on the periodic table represent the weighted average of all existing isotopes for that element. This means that the more abundant an isotope is, the more it contributes
to the weighted atomic mass listed on the periodic table. Chlorine has two isotopes, one with a mass
of 35, which is 76% abundant, and the other has a mass of 37 and is 24% abundant. Show your
work to justify the weighted atomic mass of Chlorine that is listed on the periodic table.
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Can someone me with questions 15 to 17 plz.

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.

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?