15 mol Na reacts with 15 mol Cl2 to produce NaCl. If a student carries out this procedure and obtains 12 mol NaCl, what is his percent yield?

15 mol Na reacts with 15 mol Cl2 to produce NaCl. If a student carries out this procedure and obtains 12 mol NaCl, what is his percent yield?

Explanation:

Check for LR

15

m

o

l

C

l

2

⋅

2

m

o

l

N

a

1

m

o

l

C

l

2

Therefore 30 mol Na will be required to react, and since we don't have that amount, Na is limiting.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.