# chemistry

when the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe203.in a certain experiment, 20.00g of iron metal was reacted with 11.20g of oxygen gas. After the experiment the iron was totally consumed and 3.56g oxygen gas remained. Calculate the amounts of FeO and Fe 203 formed in this experiment

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. This is another set of simultaneously solved equations but it is more complicated.
You must separate, somehow, the Fe used to form FeO from the Fe used to form Fe2O3 and/or separate the oxygen used for form FeO and oxygen used to form Fe2O. Then solve stoichiometry problem to find how much FeO and Fe2O3 were formed.
2 Fe + O2 ==> 2FeO
4Fe + 3O2 ==> 2Fe2O3.
Fe used = 20.00 g
O2 used = 11.20-3.56 = 7.64 g

Let X = g Fe used to form FeO
and Y = g Fe used to form Fe2O3 so
eqn 1 is X + Y = 20.00

For equation 2 I used O2 needed for the X part of the 20g Fe + O2 needed for the Y part of the 20 g Fe. That is
(X/2*55.85) + (3Y/4*55.85) = 7.65/32

When you find X and Y, the use regular stoichiometry to convert X to grams FeO formed and Y to grams Fe2O3 formed. Post your work if you get stuck.

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. The first line of the question states that a mixture of iron II oxide and ironIII oxide is formed WHEN oxygen is limited. But in this situation Oxygen is in excess (it starts with 11.20g of Oxygen and end with 3.56g Oxygen while the metal is used up). So only one form of oxide will preferentially be formed. That’s how I look at it.

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### science

iron (III) oxide is formed when iron combines with oxygen in the air. how many grams of Fe2O3 are formed when 16.7g of Fe reacts completely with oxygen? 4Fe(s) + 3O2(grams) => 2Fe2O3(s)

2. ### science (percentage yield)

if 100g of iron reacts with excess oxygen, how much rust should be produced?

3. ### Chemestry

Iron metal reacts with oxygen gas to form rust, iron (III) oxide. Which of the following correctly shows the balanced equation for this reaction?

4. ### Physical Science

If 100 g of iron reacts with excess oxygen,how much rust should be produced

1. ### chemistry

Ammonia chemically reacts with oxygen gas to produce nitric oxide and water . What mass of ammonia is consumed by the reaction of 4.5g of oxygen gas? Round your answer to significant digits.

2. ### Chemistry

1. Aluminum reacts with oxygen to produce aluminum oxide which can be used as an adsorbent, desiccant or catalyst for organic reactions. 4Al(s) + 3O2(g) → 2Al2O3(s) A mixture of 82.49 g of aluminum ( Picture = 26.98 g/mol) and

3. ### Chemistry

iron metal & oxygen combine to form magnetic oxide of iron, Fe3O4. How many mols of iron can be converted to magnetic by 8.80 mols of pure oxygen?

4. ### AP Chemistry

Iron pyrite (FeS2) is the form in whichmuch of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a

1. ### Chemistry Balancing Equations

Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with

2. ### Chemistry

1.Hydrogen gas can be made by reacting methane (CH4) with high temperature steam: CH4(g) + H2O(g) ----- CO(g) + 3H2(g) How many hydrogen molecules are produced when 256 grams of methane reacts with steam? 2. Ammonia (NH3) reacts