The half life for the radioactive decay of carbon- to nitrogen- is years. suppose nuclear chemical analysis shows that there is of nitrogen- for every of carbon- in a certain sample of rock. calculate the age of the rock. round your answer to significant digits.

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.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

How many moles are contained in 5.6 l of h2 at stp