This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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?