Counting Atoms and Chemical Reactions

In this reaction, how many atoms of hydrogen are found on the reactant side of the equation?

• 1

• 3

• 6

• 8

Tags

NGSS.MS-PS1-1

What does the principle of conservation of mass mean?

• The total mass of the reactants is more than the products

• Matter is not created or destroyed

• The total mass of the reactants is less than the products

Tags

NGSS.MS-PS1-5

What is the subscript for hydrogen in H₂SO₄?

• 2

• 4

• 1

• 3

Tags

NGSS.MS-PS1-1

How many carbon atoms are in 2C₂H₄O₂?

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

In Ba(NO₃)₃, how many barium atoms are present?

• barium atom

• barium atoms

• barium atoms

• barium atoms

Tags

NGSS.MS-PS1-1

In the compound Co(NO₃)₂, what is the total number of atoms?

• 7 atoms

• 8 atoms

• 9 atoms

• 10 atoms

Tags

NGSS.MS-PS1-1

In Ba(NO₃)₃, how many nitrogen atoms are there?

• 1 nitrogen atom

• 2 nitrogen atoms

• 3 nitrogen atoms

• 4 nitrogen atoms

Tags

NGSS.MS-PS1-1

What is the correct molecular formula for water?

• H₂O

• H₂O₂

• HO

• H₃O

Tags

NGSS.MS-PS1-1

What is underlined in the chemical equation below?

Na + Cl ---> NaCl

• Products

• Reactants

Number IN FRONT of reactants or products

• product

• reactant

• coefficient

• subscript