SPS3 Remediation

Look at the following chemical equation. NaBr + Cl₂ → 2NaCl + Br₂ Is this a balanced chemical equation?

• No, because the mass of the reactants is less than the mass of the products.

• No, because the reactants contain fewer molecules than the products.

• Yes, because the reactants contain the same number of chlorine (Cl) atoms as the products.

• Yes, because the mass of the reactants is equal to the mass of the products.

What type of reaction is displayed below? AgNO₃ + KI → KNO₃ + AgI

• synthesis

• decomposition

• single replacement

• double replacement

Balance the following chemical reaction according to the law of conservation of mass. Coefficients should be separated by commas. (For example 4, 2, 1, 1) ___KOH + ___H₃PO₄ → ___K₃PO₄ + ___H₂O

The equation below is unbalanced. What are the missing coefficients needed to make this equation balanced from left to right?

• 1, 2, 3

• 1, 2, 2

• 2, 4, 3

• 2, 1, 2

The equation shows an unbalanced chemical reaction: ___ Fe + ___ O2 → ___ Fe2O3. What are the missing coefficients that are needed to make this equation balanced from left to right?

• 1, 1, 1

• 2, 3, 1

• 2, 3, 2

• 4, 3, 2

The equation shows the reaction between ammonia (NH3) and oxygen (O2): __NH3 + __O2 → __NO + __H2O. From left to right, which set of coefficients balances the equation to follow the law of conservation of mass?

• 4, 5, 4, 6

• 5, 4, 5, 4

• 5, 4, 4, 5

• 4, 6, 4, 5

What type of reaction is shown in the equation below? 2H₂O → 2H₂ + O₂

• synthesis

• decomposition

• single replacement

• double replacement

When a chemical reaction occurs in a sealed container, what is the total mass after the reaction compared to the total mass before the reaction?

• less

• more

• the same

• variable

Which equation shows conservation of atoms?

• H₂ + O₂ → 2H₂O

• 2H₂ + 2O₂ → 2H₂O

• H₂ + O₂ → H₂O

• 2H₂ + O₂ → 2H₂O

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.MS-PS1-5