4fecr2o7 + 8 k2co3 + o2. = 2 fe2o3 + 8 k2cro4 + 8 co2 based on this formula a) how many grams of o2 are required to produce 44.0grams of co2? and b) how many moles of fe2o3 will be produced from 6.8 moles of k2co3?

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?