What molar concentration of pb2 is required in a 3.0 m nabr solution to observe initial precipitation of pbbr2 (ksp 4.67 x 10)? a. 1.6 x 106 m x e. 1.1 x 102 m d. 1.3 x 102 m b. 5.2 x 107 m c. 0.52 m

Which position represents spring in the southern hemisphere? a) b) c) d)

Can someone me with 3 and 4 plz. this is for masteries test.

Which of the following best describes technology a. something created for only scientists to use b.the method of thinking that scientists use. c.the application of engineering to create useful products. c. a scientific idea