Chapter 32-Chemical Formulas And Chemical Equations

Question 1

Give the name and formula of 4 covalent compounds.

Answer 1

Hydrogen chloride-HCl
Water-H2O
Methane-CH4
Carbon Dioxide-CO2

Question 2

Give the name and formula of 4 ionic compounds.

Answer 2

Sodium chloride-NaCl
Manganese dioxide-MnO2
Sodium hydroxide-NaOH
Calcium Chloride-CaCl2

Question 3

What are the types of equations in chemistry?

Answer 3

Word equations and chemical equations.

Question 4

What are reactants?

Answer 4

Reactants are the starting chemicals that are always on the left side of the equation.

Question 5

What are products?

Answer 5

Products are the chemicals produced in a reaction, they are written on the right side of the equation.

Question 6

What is a chemical equation?

Answer 6

It is similar to a word equation except it uses symbols (for elements) and formulas (for compounds) in the equation.

Question 7

What is a balanced equation?

Answer 7

A balanced equation is one in which the total number of atoms of each element on the left-hand side of the equation is equal to the total umber of atoms on the right-hand side of the equation.

Question 8

What is one rule when balancing an equation?

Answer 8

When balancing an equation,number are put in front of formulas, but the formulas themselves must never be changed.

Question 9

What is a chemical formula?

Answer 9

It is used to represent a compound or a molecule of a compound.