Question 2

given the reaction, pcl3 + cl2 imported asset pcl5, if 3.00 moles of cl2 are used, then how many moles of pcl5 are made?

6.00 moles

5.00 moles

3.00 moles

1.00 mole
3 points save answer
question 3

given the balanced equation, fe2o3 + 3 co imported asset 2 fe + 3 co2, what is the molar ratio of co to co2?

3: 3

3: 1

3: 2

1: 3
3 points save answer
question 4

using the equation, 4fe + 3o2 imported asset 2fe2o3, if 96.0 g of oxygen react, what mass of iron was oxidized?

32.0 g

96.0 g

167 g

223 g
3 points save answer
question 5

using the equation, c5h12 + 8o2 imported asset 5co2 + 6h2o, if 10 moles of carbon dioxide are produced, how many moles of pentane (c5h12) would need to be supplied?

2 moles

0.5 mole

5 moles

10 moles
3 points

Explanation:

1) Answer 2:  

According to reaction, 1 mol of chlorine gas gives 1 mol of

Then, 3.00 moles of chlorine gas will give :

3.00 moles of are made.

2) Answer 3:

Molar ratio is defined ratio of moles of two different substances.

Moles of carbon monoxide gas = 3 mol

Moles of carbon dioxide gas = 3 mol

Molar ratio of

Molar ratio of is 3:3.

3) Answer 4:

Moles of oxygen gas =

According to reaction 3 moles of oxygen gas reacts with 4 mol of iron metal.

Then mass of 4 mol of iron metal :4 mol × 55.85 g/mol =223.4 g≈223 g

223 grams of iron was oxidized.

4) Answer 5;

According to reaction , 5 moles of carbon dioxide are produced by 1 mol of pentane.

Then 10 moles of carbon dioxide will be produced by:

of pentane.

2 moles of pentane would need to be supplied.

fe 55.85 g/mol and h2o 18.02 g/mol.