CHEM 1305 Final Exam Review

Front

What type of reaction is represented by the equation BaCl₂ + MgSO₄ → BaSO₄ + MgCl₂?

Back

Double replacement reaction: A reaction where two compounds exchange ions to form two new compounds.

Front

What is the chemical formula for diphosphorus pentoxide?

Back

P₂O₅: A chemical compound consisting of two phosphorus atoms and five oxygen atoms.

Front

How do you convert miles per hour to meters per second?

Back

To convert miles/hr to m/s, multiply by 0.44704 (1 mile = 1609 m, 1 hour = 3600 s).

Front

What is aluminum classified as?

Back

Element: A pure substance that cannot be broken down into simpler substances by chemical means.

Front

How many protons, electrons, and neutrons are in Se²-?

Back

34 protons, 36 electrons, 45 neutrons: Selenium has 34 protons, and the 2- charge indicates it has gained 2 electrons.

Front

What is a single replacement reaction?

Back

A reaction where one element replaces another in a compound.

Front

Define a combustion reaction.

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom, which determines the element's identity.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all atoms in the compound's formula.