How many grams of iron oxide are needed to produce 558 grams of carbon dioxide? fe203(s)+3 CO2(g) ---> 3 CO2(g) +2Fe(s)

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Compare and contrast the bohr model and the electron cloud models of the atom.

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm