Balancing Chemical Equations

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Created by AbuBakr ShalabiAbuBakrShalabi

 

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1 / 20

When balancing an equation, you can change the subscripts in the chemical formulas.

2 / 20

Which statement best describes the law of conservation of energy? 

3 / 20

If 5 grams of magnesium (Mg) react with oxygen (O₂) to form magnesium oxide (MgO), the total mass of the magnesium oxide produced will be:

4 / 20

In a closed system undergoing a chemical reaction, the total mass of the reactants must be:

5 / 20

What is the Law of Conservation of Mass?

6 / 20

Why is it important to balance a chemical equation?

7 / 20

What does balancing a chemical equation mean?

8 / 20

A chemical reaction happens when ___________.

9 / 20

What is the coefficient in a balanced chemical equation?

10 / 20

What are the missing coefficients for the chemical equation below?

Ag2→ Ag +  O2

11 / 20

When balancing the equation Fe + S →  FeS, what coefficient is needed in front of FeS?

12 / 20

Which of the following equations is balanced?

13 / 20

In the balanced equation N + 3H → 2NH, how many atoms of hydrogen (H) are on the reactant side?

14 / 20

In a balanced equation, the total number of atoms of each element must be the same on both sides of the reaction arrow.

15 / 20

In the unbalanced equation: Fe + O2 → FeO3 how many Fe atoms are on the reactant side?

16 / 20

What is the coefficient needed in front of O2 to balance the following equation?

CH4 + O2  →   CO2 + 2H2O

17 / 20

What is the balanced equation for the reaction between methane (CH4) and oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)?

 

 

18 / 20

When balancing an equation, you can:

19 / 20

In the balanced equation 2H + O → 2HO, what is the coefficient of hydrogen (H) on the product side?

20 / 20

What are the missing coefficients for the chemical equation below?

P +  O2  P2O5

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