Population growth happened as nomadic tribes began to trap, catch, and keep migrating animals confined for food use. which of the following would explain this population increase?
a. the animals did not die as quickly in captivity.
b. the tribes began to come together to form larger tribes.
c. the increased available food supply decreased starvation.
d. the tribes mated with each other and increased gene pools.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

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.

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~