Chemistry 9th Grade

Front

What is a coefficient in a chemical equation?

Back

The large number to the left of a formula that indicates the number of molecules or moles of a substance.

Front

What type of bond is formed between a metal and a non-metal?

Back

Ionic bond.

Front

What type of reaction is represented by the equation: 3Ca + 2AlCl3 --> 3CaCl2 + 2Al?

Back

Single Displacement reaction.

Front

What type of reaction is represented by the equation: 2NO2 --> N2 + 2O2?

Back

Decomposition reaction.

Front

In heat transfer, from where does heat flow?

Back

Heat always flows from the hotter substance to the colder substance.

Front

What is the definition of an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What is a covalent bond?

Back

A chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, matter is neither created nor destroyed.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.