How To Balance Equations - Part 1

How To Balance Equations - Part 1

Assessment

Interactive Video

Chemistry

9th - 12th Grade

Hard

Created by

J. Coronado

FREE Resource

5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the law of conservation of mass state about atoms in a chemical reaction?

Atoms change their elemental nature.

Atoms are rearranged but conserved.

Atoms are destroyed.

Atoms are created from other elements.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What must remain the same on both sides of a chemical equation?

The number of molecules

The types of molecules

The number of each type of atom

The physical state of the compounds

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you balance a chemical equation when the atoms do not initially balance?

Ignore the imbalance as it is usually minor

Add catalysts to the reaction

Adjust the coefficients in front of the compounds

Change the subscripts in the compounds

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the formula '3 O2', what does the subscript '2' indicate?

There are two molecules of oxygen.

There are three oxygen atoms.

Each molecule has two oxygen atoms.

The oxygen is doubled in reaction.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you have two Na2O molecules, how many sodium atoms are there?

Two sodium atoms

Six sodium atoms

Four sodium atoms

Eight sodium atoms