What is the molecular formula for a compound with an Empirical formula of C2H3, if the true Molar Mass is 81 g/mol:
1 answer:
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Answer:
Choice A. 0.50 g.
Explanation:
According to the question, the reaction here converts
- caesium (cesium) carbonate and
- hydrogen bromide
to
- cesium bromide,
- carbon dioxide, and
- water.
By the Law of Conservation of Mass, matter can neither be created nor destroyed in a chemical reaction. (Shrestha et. al, Introductory & GOB Chemistry, Chemistry Libretexts, 2019.)
In other words, the mass of the reactants, combined, shall be the same as the mass of the products, combined.
What's the mass of the reactants?
.
What's the mass of the products?
Let represent the mass of carbon dioxide produced in this reaction.
The mass of the products will be:
.
The two masses shall be equal. That is:
.
.
In other words, by the Law of Conservation of Mass, the mass of carbon dioxide produced in this reaction will be .