How many carbon atoms are in 2.12 mol of propane (c3h8)? how many hydrogen atoms are in 2.12 mol of propane?

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Which position represents spring in the southern hemisphere? a) b) c) d)

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?