Chemistry – Precision and Design Semester Test

Front

What does stoichiometry include?

Back

All the above.

Front

In a science class experiment, Jackson observed ______ changes caused by collisions between atoms or molecules.

Back

Chemical

Front

What was Dalton’s proposed atomic theory?

Back

Atoms are not created or destroyed in chemical reactions, only rearranged

Front

Law of Conservation of Mass

Back

The sum of the masses of the products is always equal to the sum of the reactants

Front

Identify the four types of common chemical reactions.

Back

Combination, Decomposition, Single Displacement, Double Displacement

Front

What is the significance of Avogadro’s number in stoichiometry?

Back

It represents the number of atoms in a mole.

Front

Ava and Isla are baking cookies with 2 cups of flour and 1 cup of sugar. The recipe requires 1 cup of flour and 1 cup of sugar per batch. What is the limiting reactant?

Back

The ingredient that is completely consumed first after making the batches.

Front

What best describes a single displacement reaction?

Back

A reaction where an element replaces another element in a compound

Front

Double displacement reaction

Back

A reaction where two compounds exchange positive and negative ions to form two new compounds

Front

What are individual 'packets' or quanta of light energy called?

Back

Photons