Which one is NOT true about chemical changes? *

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

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?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?