Which of the following is an example of how humans negatively affect the quality of water on Earth? * 1 point A. overfishing of lakes B. cleaning up riverbeds C. runoff from dairy farms D. building man-made ponds

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.

When a scientific theory has been tested and proved by the scientific community, it becomes a law

How can the periodic table be used to predict the behavior of elements?