Gr 10 Physical Sciences Ch 11: Balancing chemical equations

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What is the purpose of Step 3 in balancing a chemical equation?

To indicate that heat is required for a reaction

To count the number of atoms of each element (correct)

To add state symbols to the equation

To write the unbalanced equation

What symbol is used to indicate that heat is required for a reaction?

(g) for gaseous compounds

∆ (correct)

(l) for liquids

(aq) for aqueous solutions

What is the correct state symbol for solid compounds?

(g)

(aq)

(s) (correct)

(l)

In which step do you verify that all atoms are balanced?

Step 5 Signup and view all the answers

What is the purpose of adding coefficients to the molecules in a chemical equation?

To balance the number of atoms of each element Signup and view all the answers

In the balanced equation for the combustion of methane, how many molecules of oxygen are required?

2 Signup and view all the answers

What is the correct sequence of steps in balancing a chemical equation?

Write the unbalanced equation, count the atoms, balance the atoms, verify, and add state symbols Signup and view all the answers

What is the purpose of Step 6 in balancing a chemical equation?

To add state symbols to the equation Signup and view all the answers

What is the law of conservation of mass?

The mass of a closed system will remain constant, regardless of the processes occurring within the system Signup and view all the answers

What happens to the mass of a closed system during a chemical reaction?

It remains constant Signup and view all the answers

What is the purpose of balancing a chemical equation?

To ensure the law of conservation of mass is obeyed Signup and view all the answers

What is the first step in balancing a chemical equation?

Identify the reactants and products Signup and view all the answers

What is the result of balancing the equation for the reaction between iron and sulfur?

The mass of the reactants equals the mass of the products Signup and view all the answers

What is the total mass of one molecule of FeS?

87.9 g/mol Signup and view all the answers

Why is it necessary to balance a chemical equation?

To ensure the law of conservation of mass is obeyed Signup and view all the answers

What is the purpose of using the relative atomic masses in balancing a chemical equation?

To calculate the mass of the molecules Signup and view all the answers

Which step in balancing a chemical equation involves counting the number of atoms of each element in the reactants and products?

Step 3 Signup and view all the answers

What is the purpose of adding coefficients in balancing a chemical equation?

To make the number of atoms of each element equal on both sides Signup and view all the answers

What is indicated by the symbol ∆ in a chemical equation?

The presence of heat Signup and view all the answers

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

Change the coefficients, add state symbols, verify Signup and view all the answers

What is the purpose of state symbols in a chemical equation?

To indicate the phase of the reactants and products Signup and view all the answers

Which of the following is an example of a balanced chemical equation?

CH₄ + 2O₂ → CO₂ + 2H₂O Signup and view all the answers

What is the result of balancing the equation for the combustion of methane?

One molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide and two molecules of water Signup and view all the answers

What is the importance of balancing a chemical equation?

To ensure that the number of atoms of each element is equal on both sides Signup and view all the answers

What is the fundamental principle that states that the mass of a closed system will remain constant, regardless of the processes occurring within the system?

Law of Conservation of Mass Signup and view all the answers

What is the reason for balancing a chemical equation?

To ensure that the number of atoms of each element is the same on both sides of the equation Signup and view all the answers

What is the first step in balancing a chemical equation?

Identify the reactants and the products in the reaction and write their chemical formulas Signup and view all the answers

What is the purpose of using the relative atomic masses in balancing a chemical equation?

To calculate the mass of the reactants and products Signup and view all the answers

What is the result of balancing the equation for the reaction between iron and sulfur?

The mass of the reactants equals the mass of the products Signup and view all the answers

What is the consequence of not balancing a chemical equation?

The mass of the reactants will not equal the mass of the products Signup and view all the answers

What is the purpose of ensuring that the number of atoms of each element is the same on both sides of the equation?

To ensure that the mass of the reactants equals the mass of the products Signup and view all the answers

What is the underlying principle that ensures that the total mass of the reactants equals the total mass of the products in a chemical reaction?

Law of Conservation of Mass Signup and view all the answers

What is the fundamental principle that governs the balancing of a chemical equation?

The law of conservation of mass Signup and view all the answers

What is the purpose of balancing a chemical equation?

To ensure that the number of atoms of each element is the same on both sides of the equation Signup and view all the answers

According to the law of conservation of mass, what happens to the mass of a closed system during a chemical reaction?

It remains constant Signup and view all the answers

What is the result of balancing the equation for the reaction between iron and sulfur?

The mass of the reactants equals the mass of the products Signup and view all the answers

Why is it necessary to balance a chemical equation?

To ensure that the law of conservation of mass is obeyed Signup and view all the answers

What is the correct sequence of steps in balancing a chemical equation?

Identify the reactants and products, write the equation, and then balance Signup and view all the answers

What is the purpose of using the relative atomic masses in balancing a chemical equation?

To calculate the total mass of the reactants and products Signup and view all the answers

What is the consequence of not balancing a chemical equation?

The law of conservation of mass will not be obeyed Signup and view all the answers

What is the purpose of Step 4 in balancing a chemical equation?

To adjust the coefficients to balance the atoms Signup and view all the answers

What does the state symbol (g) represent in a chemical equation?

Gaseous compound Signup and view all the answers

What is the purpose of adding coefficients to the molecules in a chemical equation?

To balance the atoms Signup and view all the answers

What is the result of balancing the equation for the combustion of methane?

CH₄ + 2O₂ → CO₂ + 2H₂O Signup and view all the answers

What is the importance of ensuring that the number of atoms of each element is the same on both sides of the equation?

To ensure the law of conservation of mass is obeyed Signup and view all the answers

What is indicated by the symbol Δ in a chemical equation?

Heat is required for the reaction Signup and view all the answers

What is the purpose of Step 5 in balancing a chemical equation?

To verify that all atoms are balanced Signup and view all the answers

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

Identify the reactants and products, write the unbalanced equation, count the number of atoms, adjust the coefficients, verify that all atoms are balanced, and add state symbols Signup and view all the answers

What is the primary reason for balancing a chemical equation?

To verify that the law of conservation of mass is upheld Signup and view all the answers

What is the effect of not balancing a chemical equation?

The mass of the reactants will not equal the mass of the products Signup and view all the answers

In which step of balancing a chemical equation do you adjust the coefficients to balance the atoms?

Step 4 Signup and view all the answers

What is the purpose of state symbols in a chemical equation?

To indicate the phase of the reactants and products Signup and view all the answers

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

Steps 1, 2, 3, 4, 5, 6 Signup and view all the answers

What is indicated by the symbol Δ in a chemical equation?

Heat is required for the reaction Signup and view all the answers

What is the purpose of counting the number of atoms of each element in the reactants and products?

To balance the atoms in the equation Signup and view all the answers

What is the result of balancing the equation for the combustion of methane?

CH₄ + 2O₂ → CO₂ + 2H₂O Signup and view all the answers

What is the primary reason for ensuring that the number of atoms of each element is the same on both sides of a chemical equation?

To satisfy the law of conservation of mass Signup and view all the answers

What is the purpose of calculating the mass of the reactants and products in a chemical equation?

To verify the law of conservation of mass Signup and view all the answers

What happens to the mass of the reactants and products in a balanced chemical equation?

The mass of the reactants and products remains the same Signup and view all the answers

What is the consequence of not balancing a chemical equation?

The reaction will occur, but the mass of the reactants will not equal the mass of the products Signup and view all the answers

What is the primary goal of balancing a chemical equation?

To satisfy the law of conservation of mass Signup and view all the answers

What is the purpose of using the relative atomic masses in balancing a chemical equation?

To calculate the mass of the reactants and products Signup and view all the answers

What is the underlying principle that governs the balancing of a chemical equation?

The law of conservation of mass Signup and view all the answers

What is the importance of ensuring that the number of atoms of each element is the same on both sides of a chemical equation?

It ensures that the law of conservation of mass is satisfied Signup and view all the answers

What is the purpose of Step 2 in balancing a chemical equation?

To write the unbalanced equation Signup and view all the answers

What is the correct sequence of elements to balance in a chemical equation?

Carbon, hydrogen, oxygen Signup and view all the answers

What is indicated by the state symbol (aq) in a chemical equation?

An aqueous solution Signup and view all the answers

Why is it important to balance a chemical equation?

To ensure that the number of atoms of each element is the same on both sides of the equation Signup and view all the answers

What is the purpose of adding coefficients in a chemical equation?

To balance the atoms of each element Signup and view all the answers

Gr 10 Physical Sciences Ch 11: Balancing chemical equations

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Questions and Answers

What is the purpose of Step 3 in balancing a chemical equation?

What symbol is used to indicate that heat is required for a reaction?

What is the correct state symbol for solid compounds?

In which step do you verify that all atoms are balanced?

What is the purpose of adding coefficients to the molecules in a chemical equation?

In the balanced equation for the combustion of methane, how many molecules of oxygen are required?

What is the correct sequence of steps in balancing a chemical equation?

What is the purpose of Step 6 in balancing a chemical equation?

What is the law of conservation of mass?

What happens to the mass of a closed system during a chemical reaction?

What is the purpose of balancing a chemical equation?

What is the first step in balancing a chemical equation?

What is the result of balancing the equation for the reaction between iron and sulfur?

What is the total mass of one molecule of FeS?

Why is it necessary to balance a chemical equation?

What is the purpose of using the relative atomic masses in balancing a chemical equation?

Which step in balancing a chemical equation involves counting the number of atoms of each element in the reactants and products?

What is the purpose of adding coefficients in balancing a chemical equation?

What is indicated by the symbol ∆ in a chemical equation?

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

What is the purpose of state symbols in a chemical equation?

Which of the following is an example of a balanced chemical equation?

What is the result of balancing the equation for the combustion of methane?

What is the importance of balancing a chemical equation?

What is the fundamental principle that states that the mass of a closed system will remain constant, regardless of the processes occurring within the system?

What is the reason for balancing a chemical equation?

What is the first step in balancing a chemical equation?

What is the purpose of using the relative atomic masses in balancing a chemical equation?

What is the result of balancing the equation for the reaction between iron and sulfur?

What is the consequence of not balancing a chemical equation?

What is the purpose of ensuring that the number of atoms of each element is the same on both sides of the equation?

What is the underlying principle that ensures that the total mass of the reactants equals the total mass of the products in a chemical reaction?

What is the fundamental principle that governs the balancing of a chemical equation?

What is the purpose of balancing a chemical equation?

According to the law of conservation of mass, what happens to the mass of a closed system during a chemical reaction?

What is the result of balancing the equation for the reaction between iron and sulfur?

Why is it necessary to balance a chemical equation?

What is the correct sequence of steps in balancing a chemical equation?

What is the purpose of using the relative atomic masses in balancing a chemical equation?

What is the consequence of not balancing a chemical equation?

What is the purpose of Step 4 in balancing a chemical equation?

What does the state symbol (g) represent in a chemical equation?

What is the purpose of adding coefficients to the molecules in a chemical equation?

What is the result of balancing the equation for the combustion of methane?

What is the importance of ensuring that the number of atoms of each element is the same on both sides of the equation?

What is indicated by the symbol Δ in a chemical equation?

What is the purpose of Step 5 in balancing a chemical equation?

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

What is the primary reason for balancing a chemical equation?

What is the effect of not balancing a chemical equation?

In which step of balancing a chemical equation do you adjust the coefficients to balance the atoms?

What is the purpose of state symbols in a chemical equation?

What is the correct sequence of steps in balancing a chemical equation if the equation is not balanced?

What is indicated by the symbol Δ in a chemical equation?

What is the purpose of counting the number of atoms of each element in the reactants and products?

What is the result of balancing the equation for the combustion of methane?

What is the primary reason for ensuring that the number of atoms of each element is the same on both sides of a chemical equation?

What is the purpose of calculating the mass of the reactants and products in a chemical equation?

What happens to the mass of the reactants and products in a balanced chemical equation?

What is the consequence of not balancing a chemical equation?

What is the primary goal of balancing a chemical equation?

What is the purpose of using the relative atomic masses in balancing a chemical equation?

What is the underlying principle that governs the balancing of a chemical equation?

What is the importance of ensuring that the number of atoms of each element is the same on both sides of a chemical equation?

What is the purpose of Step 2 in balancing a chemical equation?

What is the correct sequence of elements to balance in a chemical equation?

What is indicated by the state symbol (aq) in a chemical equation?

Why is it important to balance a chemical equation?

What is the purpose of adding coefficients in a chemical equation?

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