Reacciones Químicas | Chemistry | Quiz

A chemical reaction is the process of converting _____ to _____.

atoms; molecules

reactants; products

an acid; a base

matter; energy
Antoine Lavoisier broke with the alchemists in declaring that _____ is neither created or destroyed in chemical reactions.

proportions

synthesis

mass

energy
In water, the mass of oxygen is 8 times that of hydrogen, no matter how the water was created. This is known as the Law of _____.

Mass Conservation

Definite Proportions

Multiple Proportions

Proust
Carbon and oxygen can form CO and CO₂ in the following ways: 1.33g of O combines with 1g of C (a ratio of 1.33:1) to form CO and 2.66g of O combines with 1g of C (a ratio of 2.66:1) to form CO₂. What is this an example of?

Dalton’s Law

Law of Mass Conservation

Law of Definite Proportions

Law of Multiple Proportions
An acid can be defined as a hydrogen ion acceptor.

false

true
For a process to be defined as a chemical reaction, _____ must be produced.

a new substance

the same substance

light

more mass
Which equation indicates a synthesis reaction?

2HgO (solid) -> 2Hg (liquid) + O₂ (gas)

CH₄ (gas) + 2O₂ (gas) -> CO₂ (gas) + 2H₂O (liquid)

Zn + Cu²⁺ -> Zn²⁺ + Cu

4H₂ (gas) + 2O₂ (gas) -> 4H₂O
Which of the following are required for combustion to take place?

Only oxygen

Only energy

Only fuel

All of the above
The Daniell battery used a simple chemical reaction using zinc and copper sulfate: Zn (solid) + CuSO₄ (aqueous) -> ZnSO₄ (aqueous) + Cu (solid). What type of chemical reaction is this?

Synthesis reaction

Decomposition reaction

Single replacement reaction

Acid-base reaction
Oxidation and reduction reactions must occur together.

true

false