Which type of investigation is based on observation?
1 answer:
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Explanation:
When heat is absorbed by reactants in a chemical reaction then the reaction is known as endothermic reaction.
Whereas when heat is released by reactants in a chemical reaction then the reaction is known as exothermic reaction.
1. When is positive then it means heat is absorbed by reactants and reaction is endothermic.
2. When , this means energy of products is less than the energy of reactants. Therefore, it is exothermic in nature.
3. When energy is absorbed then reaction is endothermic.
4. When , this means energy of products is greater than the energy of reactants. Therefore, it is endothermic in nature.
5. When [tex]\Delta H is negative then it means heat is released by reactants and reaction is exothermic.
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 .