What is 5.545 as a percent

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.