Which of the following factors determines how harmful an introduced chemical will be on the environment?
a type of chemical
b. concentration
C. weather conditions
d. all of the above

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.