Which one of the following, when 1 mole is dissolved in water, produces the solution with the lowest pH? a. H2SO4
b. KCl
c. LiOH
d. CaCl2
e. AlCl3

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse