Chemistry

posted by .

A 500g iron (Fe) rod was left in air for a long period of time, and got covered with rust (Fe2O3) as a result of reaction with atmospheric oxygen. The mass of the rusty rod was determined as 560g.

a) calculate the theoretical yield of Fe2O3(s), that is the mass of Fe2O3(s) that would form if all Fe reacted. For your convenience, molecular weights of Fe and Fe2O3 are 55.845 g/mol and 159.69 g/mol, respectively.
b)calculate the mass of Fe2O3(s) in the rusty rod?

My work:

a.) Fe= 55.845/500g= 0.11169
Fe2O3= 159.69/560=0.285

I'm stuck on what to do next.

Also I don't get how to do part b.

Please help Thanks!

  • Chemistry -

    there's a part c that I didn't know how to do either...

    c) Calculate the actual percent yield of Fe2O3(s)

  • Chemistry -

    4Fe + 3O2 => 2Fe2O3

    mols Fe = 500 g/atomic mass Fe = ?
    Use the equation to convert mols Fe to mols Fe2O3. That will be
    mols Fe x (2 mols Fe2O3/4 mol Fe) = ?mols Fe x (1/2) = ?? This is theoretical yield.
    Grams Fe2O3 = mols x molar mass
    %yield = (actual yield/theoretical yield)*100 = ?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Write the balanced chemical reaction for the rusting of iron?
  2. Chemistry

    Iron is obtained from iron ore according to the following reaction: Fe2O3+CO---> Fe+CO2 (unbalanced). a. Assuming the blast furnace is 90.0% efficient in recovering the iron, what is the actual mass of iron obtainable from a ton …
  3. physics

    A 1-kg mass (the blue mass) is connected to a 9-kg mass (the green mass) by a massless rod 70 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1-kg mass, and the rod and masses are free to rotate …
  4. physics

    A 1-kg mass (the blue mass) is connected to a 9-kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1-kg mass, and the rod and masses are free to rotate …
  5. physics

    A 1-kg mass (the blue mass) is connected to a 8-kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1-kg mass, and the rod and masses are free to rotate …
  6. physics

    A 1-kg mass (the blue mass) is connected to a 9-kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1-kg mass, and the rod and masses are free to rotate …
  7. physics

    A 1-kg mass (the blue mass) is connected to a 9-kg mass (the green mass) by a massless rod 67 cm long, as shown in the figure. A hole is then drilled in the rod 40.2 cm away from the 1-kg mass, and the rod and masses are free to rotate …
  8. Chemistry

    Iron combines with oxygen and water from the air to form rust. If an iron nail were allowed to rust completely, one should find that the rust weighs: I know the answer is the rust should way more than the nail it came from but can …
  9. Math, Algebra

    Rod a is twice as long as rod b, rod c is 1/12m shorter than rod b. If rod c is 1/6m long, find the total length of Rod a and Rod b I thought it would be 2x+(x+1/12)+1/6
  10. Physical Science

    An iron fence is left unpainted, and it reacts with the oxygen in the air, forming rust. The formation of rust is an oxidation-reduction reaction, but it is also an example of a(n) _________ reaction My answer is synthesis

More Similar Questions