Chemistry EOC Review 2024

Front

How does a scientific theory become a law?

Back

Many scientists give evidence for the relationship between two variables.

Front

Given the balanced chemical equation, how many moles of Iron chloride will theoretically be produced from 3 moles of chlorine gas? (2Fe + 3Cl2 = 2FeCl3)

Back

2 moles of Iron chloride.

Front

When nitrogen gas reacts with hydrogen gas, ammonia is produced. How much ammonia will be produced from 2.3 moles of nitrogen gas? (N2 + 3H2 --> 2NH3)

Back

4.6 moles of ammonia.

Front

What happens when sodium reacts with fluorine to form sodium fluoride?

Back

Electrons are transferred and the bonding is ionic.

Front

What describes a solution of NaOH?

Back

The solution has a pH of more than 7.

Front

What is a scientific theory?

Back

A well-substantiated explanation of an aspect of the natural world that is based on a body of evidence.

Front

What is the difference between a hypothesis and a theory?

Back

A hypothesis is a testable prediction, while a theory is a well-supported explanation.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a balanced chemical equation?

Back

An equation where the number of atoms for each element is the same on both sides.

Front

What is the pH scale?

Back

A scale that measures how acidic or basic a solution is, ranging from 0 to 14.