Select the correct answer. a substance is followed by the symbol (7) in a chemical equation. what does the symbol represent? a. the substance has the least molecules in the equation. ob. the substance is in the liquid state. c. the substance is produced last in the reaction. od. the substance is dissolved in a liquid solution. o e. the substance is lost at the end of the reaction. reset next

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption

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.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?