What biological processes can add co2 to the atmosphere?

Express the following number in scientific notation. 0.026890 =

Calculate the number of molecules present in 0.750 mol of mgo.

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.