Question

Balance the equation: Fe + O₂ ---> Fe₂O₃ How many moles of Fe₂O₃ are produced when 0.275 moles of Fe is reacted?

Answer 1

Answer:

2 KClO3 è 2 KCl + 3 O2

1. How many moles of O2 will be formed from 1.65 moles of KClO3?

2. How many moles of KClO3 are needed to make 3.50 moles of KCl?

3. How many moles of KCl will be formed from 2.73 moles of KClO3?

4 Fe + 3 O2 è 2 Fe2O3

4. How many moles of Fe2O3 are produced when 0.275 moles of Fe are reacted?

5. How many moles of Fe2O3 are produced when 31.0 moles of O2 are reacted?

6. How many moles of O2 are needed to react with 8.9 moles of Fe?

2 H2O è 2 H2 + O2

7. How many moles of O2 are produced when 1.26 moles of H2O is reacted?

8. How many moles of H2O are needed to produce 55.7 moles of H2?

9. If enough H2O is reacted to produce 3.40 moles of H2, then how may moles of O2 must have been made?

(a bit challenging, but just think about it and you can probably figure it out)

1.65 mol KClO3

2 mol KClO3

= 2.48 mol O2

3.50 mol KCl

mol KCl

mol KClO3

= mol KClO3 2

3.50

2.73 moles KClO3

mol KClO3

mol KCl

= mol KCl 2

2.73

0.275 mol Fe

= mol Fe2O3

4 mol Fe

2 mol Fe2O3 0.138

31.0 mol O2

= mol Fe2O3

3 mol O2

2 mol Fe2O3 20.7

8.9 mol Fe

= mol O2

4 mol Fe

3 mol O2 6.72 KClO3 è 2 KCl + 3 O2

1. How many moles of O2 will be formed from 1.65 moles of KClO3?

2. How many moles of KClO3 are needed to make 3.50 moles of KCl?

3. How many moles of KCl will be formed from 2.73 moles of KClO3?

4 Fe + 3 O2 è 2 Fe2O3

4. How many moles of Fe2O3 are produced when 0.275 moles of Fe are reacted?

5. How many moles of Fe2O3 are produced when 31.0 moles of O2 are reacted?

6. How many moles of O2 are needed to react with 8.9 moles of Fe?

2 H2O è 2 H2 + O2

7. How many moles of O2 are produced when 1.26 moles of H2O is reacted?

8. How many moles of H2O are needed to produce 55.7 moles of H2?

9. If enough H2O is reacted to produce 3.40 moles of H2, then how may moles of O2 must have been made?

(a bit challenging, but just think about it and you can probably figure it out)

1.65 mol KClO3

2 mol KClO3

= 2.48 mol O2

3.50 mol KCl

mol KCl

mol KClO3

= mol KClO3 2

3.50

2.73 moles KClO3

mol KClO3

mol KCl

= mol KCl 2

2.73

0.275 mol Fe

= mol Fe2O3

4 mol Fe

2 mol Fe2O3 0.138

31.0 mol O2

= mol Fe2O3

3 mol O2

2 mol Fe2O3 20.7

8.9 mol Fe

= mol O2

4 mol Fe

3 mol O2 6.7

1.26 mol H2O

= mol O2 2 mol H2O

1 mol O2 .630

55.7 mol H2

= mol H2O 2 mol H2

2 mol H2O 55.7

3.40 mol H2

= mol O2 2 mol H2

1 mol O2 1.70

3 mol

1.26 mol H2O

= mol O2 2 mol H2O

1 mol O2 .630

55.7 mol H2

= mol H2O 2 mol H2

2 mol H2O 55.7

3.40 mol H2

= mol O2 2 mol H2

1 mol O2 1.70

3 mol

Answer 2

Given: The given reaction is Fe + O₂ ---> Fe₂O₃

To find: We have to find out the balanced reaction and number of moles of Fe₂O₃ produced.

Solution:

The balanced equation is-

$4Fe + 3O₂\rightarrow 2Fe₂O₃$

Here 4 moles of iron reacts with 3 moles of oxygen to form 2 moles of ferrous oxide.

4 moles of Fe reacted to form 2 moles of Fe₂O₃

Thus 0.275 moles of Fe will react to form

$\frac{0.275}{4} \times 2 \\ = 0.1375$

moles of Fe₂O₃ .

So, 0.1375 moles of Fe₂O₃ is reacted.