Use the equation below to determine how many grams of co are needed to react with an excess of fe2o3 to produce 104.9 g fe? you must show all of your work to receive credit.

molar mass information:
fe= 55.85 g/mol
c= 12.01 g/mol
o= 15.99 g/mol
(3 points)

i am so lost if you explain ill give you more points

What is the relation between concentration of reactants and the rate of chemical reaction?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball