Free Printable Balancing Equations & Mole Ratios

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Balancing Equations & Mole Ratios

Total questions: 17

Worksheet time: 30mins

Name

Class

Date

Balance this equation.
_SnO₂+_H₂-->_Sn +_H₂O

1,1,2,1

1,2,1,1

1,2,1,2

1,2,2,1

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

2,1,2,1

1,2,2,1

1,2,1,2

2,2,2,2

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is doubled

the product is half the mass of the reactants

the mass is the same

the mass changes depending on the reaction

What is the right part of a chemical equation called...

H_{2 +}O₂ --> H₂O

Reactants

Products

Yields

Chemical Equation

What is the arrow in a chemical equation...

H_{2 +}O₂ --> H₂O

Reactants

Products

Yields

Chemical Equation

What coefficients are needed to balance the equation ?

__H₂SO₃ + __KOH--> __H₂O+ __K₂SO₃

2,1 --> 2,1

1,2 --> 1,1

1,2 --> 1,2

1,2 --> 2,1

N₂ + 3H₂ → 2NH₃
What is the mole ratio between Nitrogen and Ammonia in the above reaction?

1 moles NH₃ / 2 moles N₂

2 moles NH₃ / 1 moles N₂

2 moles N₂ / 3 moles NH₃

1 moles N₂ / 3 moles NH₃

What number should be in front of N₂ in this chemical equation?
___N₂+___F₂ --> ___ NF₃

3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe
What is the Ratio of moles of Mg to moles Fe?

3mol Mg / 2 mol Fe

2 mol Mg/ 3 mol Fe

1 mol Fe/ 2 mol Fe

3 mol MgO / 2 mol Fe

10.

Where are the numbers for a mole ratio found?

They are part of the chemical formulas for the reactants / products.

They are given in the problem.

They are found on the periodic table for those elements.

They are found as coefficients in the reaction's balanced chemical equation.

11.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

12.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

13.

Balance this equation, Al₂O₃ ---> Al + O₂

Cannot be balanced

2Al₂O₃ ---> 2Al + 3O₂

2Al₂O₃ ---> 4Al + 3O₂

3Al₂O₃ ---> 2Al + O₂

14.

Is the following equation balanced or unbalanced ?
N₂ +3 H₂ --> 2NH₃

Balanced

Unbalanced

15.

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

16.

Which problem is balanced?

PbO₂ + 2H₂

SO₂ + H₂0 --> H₂SO₄

2Na + 2H₂O --> 2NaOH + H₂

17.

__ Al + __ FeO → Al₂O₂ + __ Fe

1, 1, 2

2,1,2

2, 2, 2

2,4,2

100 %

Balancing Equations & Mole Ratios

Total questions: 17

Worksheet time: 30mins

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