What is the different between a mixture and a compound?
What do they have to do to the mixture to make it into a compound?
What is the name given to the substances they add together in a reaction?
What is the name given to the substances formed in a reaction?
What atoms combine together to make the compound carbon dioxide?
Which comes first in an equation the reactants or the products?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.

How many moles are in 1.26*10^24 particles in significant figures