Are very simple plants that do not have true roots, stems, or leaves and can grow to only a few centimeters tall. a. vascular plants b. flowering plants c. cone-bearing plants d. nonvascular plants

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.