Semester Review

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What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), lead (Pb), and iron (Fe).

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. For example, KNO₃ is a molecule made of 1 potassium atom, 1 nitrogen atom, and 3 oxygen atoms.

Front

How many atoms of sulfur are in 4Fe(SO₃)₂?

Back

There are 8 atoms of sulfur in 4Fe(SO₃)₂.

Front

What is a saturated solution?

Back

A saturated solution is a solution that contains the maximum amount of solute that can be dissolved at a given temperature.

Front

How can you make a solution more concentrated?

Back

You can make a solution more concentrated by adding more solute.

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What is the difference between a solute and a solvent?

Back

A solute is the substance that is dissolved in a solution, while a solvent is the substance that does the dissolving.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H₂O) is a compound made of hydrogen and oxygen.

Front

What is the chemical formula for potassium nitrate?

Back

The chemical formula for potassium nitrate is KNO₃.

Front

What does it mean for a solution to be unsaturated?

Back

An unsaturated solution is one that can still dissolve more solute at a given temperature.

Front

What is the role of water in a solution?

Back

Water often acts as the solvent in a solution, helping to dissolve solutes.