Questions: Stoichiometry is based on A. temperature. B. molecular weight. C. pressure. D. conservation of matter.

Transcript text: Stoichiometry is based on A. temperature. B. molecular weight. C. pressure. D. conservation of matter.

Solution

Solution Steps

Step 1: Understand the Concept of Stoichiometry

Stoichiometry is a branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It is based on the principle that matter is neither created nor destroyed in a chemical reaction.

Step 2: Identify the Principle Stoichiometry is Based On

The fundamental principle that stoichiometry relies on is the conservation of matter. This principle states that the total mass of reactants in a chemical reaction is equal to the total mass of the products. This allows chemists to calculate the amounts of substances consumed and produced in a reaction.

Step 3: Evaluate the Options

A. Temperature: While temperature can affect the rate of a reaction, it is not the basis of stoichiometry.
B. Molecular weight: Molecular weight is used in stoichiometric calculations but is not the foundational principle.
C. Pressure: Pressure can influence reactions involving gases but is not the basis of stoichiometry.
D. Conservation of matter: This is the correct principle that stoichiometry is based on.

Final Answer

The answer is \(\boxed{\text{D. conservation of matter}}\).

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