In this equation 2 K + 1 MgBr2 → 2 KBr + 1 Mg. If you produce 7 mols of KBr, how many mols of MgBr2 did you need? If I have 2 moles of MgBr2, how much KBr can I make in moles?

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?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?