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MYP Chemistry Topic 5.3 Balancing Equations… | RevisionDojo

MYP Chemistry 5.3 Balancing Equations Questionbank

Type

Difficulty

Question 1

Why is changing the subscripts in a chemical formula, such as turning $\mathrm{H}_2\mathrm{O}$ into $\mathrm{H}_2\mathrm{O}_2$ , an incorrect way to balance an equation?

It changes the chemical identity of the substance

Subscripts must always be even numbers

It violates the law of gravity

It makes the equation too long

Question 2

View answer

In the balanced equation for the combustion of methane:

\mathrm{CH}_4 + 2\mathrm{O}_2 \rightarrow \mathrm{CO}_2 + 2\mathrm{H}_2\mathrm{O}

What is the specific ratio of oxygen molecules consumed to carbon dioxide molecules produced?

1:2

1:1

2:1

2:2

Question 3

View answer

True or False: The coefficients in a balanced chemical equation represent the relative mass of each reactant and product in grams.

True

False

Question 4

View answer

True or False: In a balanced chemical equation, the ratio of the masses of the reactants is always identical to the ratio of their coefficients.

True

False

Question 5

View answer

When converting from the mass of a reactant to the mass of a product, why is the 'mole ratio' from the balanced equation considered a necessary 'bridge'?

Because mass is not conserved in chemical reactions

Because molar mass is the same for all substances in a balanced equation

Because the law of conservation of mass only applies to moles

Because coefficients represent ratios of particles or moles, not direct ratios of mass in grams

Explore 20 questions with a free account

Practise MYP Chemistry questions on 5.3 Balancing Equations and review the explanations to check your understanding.

Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.

Type

Difficulty

Question 1

View answer

Why is changing the subscripts in a chemical formula, such as turning $\mathrm{H}_2\mathrm{O}$ into $\mathrm{H}_2\mathrm{O}_2$ , an incorrect way to balance an equation?

It changes the chemical identity of the substance

Subscripts must always be even numbers

It violates the law of gravity

It makes the equation too long

Question 2

View answer

In the balanced equation for the combustion of methane:

\mathrm{CH}_4 + 2\mathrm{O}_2 \rightarrow \mathrm{CO}_2 + 2\mathrm{H}_2\mathrm{O}

What is the specific ratio of oxygen molecules consumed to carbon dioxide molecules produced?

1:2

1:1

2:1

2:2

Question 3

View answer

True or False: The coefficients in a balanced chemical equation represent the relative mass of each reactant and product in grams.

True

False

Question 4

View answer

True or False: In a balanced chemical equation, the ratio of the masses of the reactants is always identical to the ratio of their coefficients.

True

False

Question 5

View answer

When converting from the mass of a reactant to the mass of a product, why is the 'mole ratio' from the balanced equation considered a necessary 'bridge'?

Because mass is not conserved in chemical reactions

Because molar mass is the same for all substances in a balanced equation

Because the law of conservation of mass only applies to moles

Because coefficients represent ratios of particles or moles, not direct ratios of mass in grams

Explore 20 questions with a free account

Practise MYP Chemistry questions on 5.3 Balancing Equations and review the explanations to check your understanding.

Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.

MYP Chemistry 5.3 Balancing Equations Questionbank

Explore 20 questions with a free account

MYP MYP Chemistry Topic 5.3 Balancing Equations Questionbank

Explore 20 questions with a free account

MYP MYP Chemistry Topic 5.3 Balancing Equations Questionbank

MYP Chemistry 5.3 Balancing Equations Questionbank