Consider the following generic chemical equation:2A +5B-C+3D.
If you react 4 units of A with 10 units of B, which statement is true?

Okay so I know the answer is D, Substance C cannot be formed from this reaction...But I want to know why....is it just because you are using more of each A and B so you are creating a new substance of C???

Question

Consider the following generic chemical equation:2A +5B->C+3D. 
If you react 4 units of A with 10 units of B, which statement is true?

Okay so I know the answer is D, Substance C cannot be formed from this reaction...But I want to know why....is it just because you are using more of each A and B so you are creating a new substance of C???

aaronq · Answer

this question is abstract, the A's and B's don't mean much - other than the compounds are different. Was there additional information to the question?

mary.rojas · Answer

There was only multiple choice answers 
However, there was no additional information to the question

aaronq · Answer

wanna post the choices?

mary.rojas · Answer

arrr okay, lol hold on

mary.rojas · Answer

Consider the following generic chemical equation: 2A+5B->C+3D.
If you react 4 units of A with 10 units of B,which statement is TRUE?

A) Substance A will be the limiting reactant.
B)Substance B will be the limiting reactant.
C)There is just enough of A and B so that everything reacts completely.
D)Substance C cannot be formed from this reaction.
E)None of the above.

That is all that is the whole question. It is not a continued question of another question. This is simply the question
:( and idk y that is the answer and I really want to know why and am sure it is simple,buts still dont know

aaronq · Answer

The answer should be 

C) There is just enough of A and B so that everything reacts completely.

           2A+5B->C+3D

reacting 4 units of A with 10 units of B would in fact produce 2 units of C.

There is an error in the question if they're saying that the answer is D.

aaronq · Answer

If this is for an online course, you should email your instructor.

mary.rojas · Answer

Is it because the ratio is 2:5 and 4:10 is still the same ratio??
So if it was 4:9, that statement of C would not be correct???
That is what I thought was the answer but then I thought I was wrong since I found out the answer.
It is not an online course, so I will tell my professor next class about this
Thank you :)

aaronq · Answer

No problem! Yes, it's because of the coefficients

   2A+5B->C+3D

4 units of A : $\sf normalized~moles~of~A=\dfrac{4}{2}=2$

10 units of B: $\sf normalized~moles~of~B=\dfrac{10}{5}=2$

so they react completely, there is no reactants left.

mary.rojas · Answer

Ahh I see, thanks again! 
Have a wonderful Sunday :)

aaronq · Answer

thanks! you as well! :)