Which of the following statements are true about measurements and units? a. the si unit system is used by scientists all over the world. b. measurements must include numerical values and units. c. the si system is based on powers of ten. d. the unit of mass in the si system is the pound.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

What is the value of keq for the reaction expressed in scientific notation