Parts of the Chemical Equation

Which numbers are coefficients in this equation?

• 3 and 8

• 3, 8, 2, 2, 2

• 1, 5, 4, 3

• 5, 4, 3

Answer explanation

The coefficients are the large numbers in front of the molecule. It shows how many of this molecule are involved in the reaction.

Tags

NGSS.MS-PS1-5

Which numbers are subscripts in this equation?

• 3, 8, 2, 2, 1, 1, 2

• 3, 8, 2, 2, 2

• 1, 5, 4, 3

• 5, 4, 3

Answer explanation

The subscripts are the small numbers to the right of the element. It shows how many of this element are included in the molcule.

Tags

NGSS.MS-PS1-5

Which is/ are the reactant(s) in this equation?

• C₃H₈

• C₃H₈ and O₂

• H₂O and CO₂

• H₂O

Answer explanation

The reactants are the molecules on the left side of the reaction arrow.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is/ are the product(s) in this equation?

• C₃H₈

• C₃H₈ and O₂

• H₂O and CO₂

• H₂O

Answer explanation

The products are the molecules on the right side of the reaction arrow.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Label the diagram of this chemical equation

a

b

c

Reactants

Yield Sign

Elements

Products

Tags

NGSS.MS-PS1-5

Match each term with the correct picture:

• coefficient

• B (pointing to number 2 between H and O)

• element symbol

• A

• subscript

• D

• product

• F

• reactant

• E

Tags

NGSS.MS-PS1-2

Write a Balanced Equation for this reaction:
C₂H₄ + 2 O₂ -->

• C₂O₂ + H₄

• CO₂ + HOH

• CO + H

• 2 CO₂ + 2H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Match each letter or picture with the correct term:

• chemical formula

• C

• coefficient

• A

• yields, forms, produces

• 

Tags

NGSS.MS-PS1-5

How many oxygen atoms are there on the reactants side of the equation?

• 5

• 2

• 7

• 10

Answer explanation

the sbscript shows there are 2 oxygen atoms in each molecule and 5 molecules. 2 x 5 = 10 atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What elements are present here?

• 6 hydrogen, 6 oxygen and 3 carbon

• 8 hydrogen, 10 oxygen, and 3 carbon

• 8 hydrogen, 6 oxygen and 6 carbon

• 8 hydrogen, 3 oxygen and 3 carbon

Tags

NGSS.MS-LS1-6

NGSS.MS-PS1-1

NGSS.MS-PS1-5