9th Grade Chemistry

In this chemical equation, what are the reactants?

• HCl and H₂

• Al and HCl

• HCl and AlCl₃

• AlCl₃ and H₂

Is this chemical equation balanced?

• Yes

• No

Is this chemical equation balanced?

• Yes

• No

Is this chemical equation balanced?

• Yes

• No

Here, the number 6 is a(n) __________.

• subscript

• coefficient

• formula

• atom

What can you change in order to balance chemical equations?

• coefficients

• subscripts

• formulas

• products

Here, the number 3 is a ________.

• chemical equation

• coefficient

• subscript

• formula

Matter is never destroyed nor is it created.

• True

• False

A __________ is placed before a symbol or formula and defines the ratio of molecules and compounds in a chemical equation.

• superscript

• coefficient

• subscript

• reactant

You can place a coefficient in the middle of a chemical formula.

• True

• False