Home > Chemistry > Balancing Chemical Equations

If you start with 60 #CaCO_3#'s, how many #CaO#'s will you get?

Answer 1

If we write the balanced chemical equation, will that help you?

It is known that when calcium caronate is heated to a high temperature, it breaks down into carbon dioxide and calcium oxide.

We use the following stoichiometrically balanced equation to depict this decomposition:

#CaCO_3(s) + Delta rarr CaO(s) + CO_2(g)uarr#

So if I start with #1# #mol# of calcium carbonate, #100.09*g#, at most I can get #56.08*g# calcium oxide, for these masses are the molar equivalents. The difference in masses, some #44*g#, represents the molar equivalent mass of evolved carbon dioxide. The masses MUST be conserved, because masses are conserved in every chemical reaction.

If you are not satisfied with this answer, voice your objection and I will try again. Here, I started with 60 formula units of calcium carbonate; at most, I can get 60 formula units of calcium oxide. How many formula units of carbon dioxide gas were evolved in this scenario?

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Axel Alvarado

If you start with 60 molecules of CaCO3, you will get 60 molecules of CaO.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.