4. What is a disadvantage of making a model? A model may represent a complex object or process. b model may lack important information. C There is not a sufficient variety of model types. D Most models are too large for practical use.

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)