SOL Review - 6.5.f & PS.3.d - Chemical Equations

What does a chemical equation represent?

• A physical change

• A chemical reaction

• A mathematical formula

• A state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a balanced chemical equation, what must be true on both sides?

• The number of atoms of each element

• The number of molecules

• The total mass

• The temperature

Tags

NGSS.MS-PS1-5

In the equation 2H₂ + O₂ → 2H₂O, what does the arrow (→) represent?

• Decreasing temperature

• Increasing pressure

• Produces or yields

• Dissolves into

Tags

NGSS.MS-PS1-2

What law does a balanced chemical equation demonstrate?

• Law of Gravity

• Law of Conservation of Energy

• Law of Conservation of Mass

• Law of Constant Composition

Tags

NGSS.MS-PS1-5

In a chemical reaction, reactants are:

• The substances that are formed

• The substances that are used up

• The catalysts

• The products

Which of these is NOT typically included in a chemical equation?

• Reactants

• Products

• Coefficients

• Temperature

In the equation Zn + 2HCl → ZnCl₂ + H₂, how many hydrogen atoms are on each side?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to atoms during a chemical reaction?

• They are created or destroyed

• They change into different elements

• They are rearranged to form new substances

• They disappear completely

Tags

NGSS.MS-PS1-5

Which of these equations is balanced?

• H₂ + O₂ → H₂O

• 2H₂ + O₂ → 2H₂O

• H₂ + 2O₂ → H₂O

• 2H₂ + 2O₂ → 2H₂O

Tags

NGSS.MS-PS1-5

Which of the following shows a correctly balanced chemical equation?

• C6H12O6  + 6O2  → 6CO2 + 6H2O + ATP (energy)

• 6C6H12O6  + O2  → 6CO2 + 12H2O + ATP (energy)

• 12C6H12O6  + 6O2  → 4CO2 + 3H2O + ATP (energy)