Chemical Reactions & Equations

How many total atoms are in 2H₂O?

• 2

• 3

• 4

• 6

Tags

NGSS.MS-PS1-1

How many atoms are in Al₂(SO₄)₃?

• 9

• 14

• 17

• 10

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in 4NH₃?

• 3

• 4

• 12

• 16

Tags

NGSS.MS-PS1-1

What is the total number of atoms in Ca(OH)₂?

• 3

• 4

• 5

• 6

Tags

NGSS.MS-PS1-1

How many carbon atoms are in C₆H₁₂O₆?

• 1

• 6

• 12

• 24

Tags

NGSS.MS-PS1-1

What coefficient is needed to balance the equation H₂ + O₂ → H₂O?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Balance the equation: ___ Al + ___ O₂ → ___ Al₂O₃

• 2, 3, 4

• 4, 3, 2

• 3, 2, 3

• 2, 2, 1

Tags

NGSS.HS-PS1-7

What is the missing coefficient? C₃H₈ + ___ O₂ → 3CO₂ + 4H₂O

• 3

• 4

• 5

• 6

Which of the following balanced equations represents a single replacement reaction?

• Mg + 2HCl → MgCl₂ + H₂

• 2Na + Cl₂ → 2NaCl

• H₂O → H₂ + O₂

• CH₄ + 2O₂ → CO₂ + 2H₂O

Balance the equation: ___ Al + ___ F₂ → ___ AlF₃

• 2, 3, 2

• 4, 3, 2

• 3, 2, 3

• 1, 2, 1