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Questions and Answers
What is the coefficient of H2O in the initial equation before balancing?
What is the coefficient of H2O in the initial equation before balancing?
How many iron atoms are in the Fe3O4 molecule in the products in the partially balanced equation?
How many iron atoms are in the Fe3O4 molecule in the products in the partially balanced equation?
In the fully balanced equation, how many atoms of hydrogen are present in the reactants?
In the fully balanced equation, how many atoms of hydrogen are present in the reactants?
What is the total number of oxygen atoms in Fe3O4 in the balanced equation?
What is the total number of oxygen atoms in Fe3O4 in the balanced equation?
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Why is this method referred to as the 'hit-and-trial method' for balancing chemical equations?
Why is this method referred to as the 'hit-and-trial method' for balancing chemical equations?
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What information is missing in the fully balanced equation?
What information is missing in the fully balanced equation?
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What is the colour of the iron nail after it is dipped in the copper sulphate solution?
What is the colour of the iron nail after it is dipped in the copper sulphate solution?
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What type of reaction occurs when iron displaces copper from copper sulphate solution?
What type of reaction occurs when iron displaces copper from copper sulphate solution?
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What is the product formed when zinc reacts with copper sulphate solution?
What is the product formed when zinc reacts with copper sulphate solution?
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What is the observation when sodium sulphate solution is mixed with barium chloride solution?
What is the observation when sodium sulphate solution is mixed with barium chloride solution?
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Which of the following elements is more reactive than copper?
Which of the following elements is more reactive than copper?
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What is the chemical formula for the reaction between iron and copper sulphate solution?
What is the chemical formula for the reaction between iron and copper sulphate solution?
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During the reaction CuO + H2 → Cu + H2O, which substance is being oxidised?
During the reaction CuO + H2 → Cu + H2O, which substance is being oxidised?
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Which statement is true about redox reactions?
Which statement is true about redox reactions?
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What product is formed when magnesium ribbon burns in oxygen?
What product is formed when magnesium ribbon burns in oxygen?
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In the example reaction ZnO + C → Zn + CO, which substance is being reduced?
In the example reaction ZnO + C → Zn + CO, which substance is being reduced?
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Which compound undergoes reduction in the reaction MnO2 + 4HCl → MnCl2 + 2H2O + Cl2?
Which compound undergoes reduction in the reaction MnO2 + 4HCl → MnCl2 + 2H2O + Cl2?
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What is the product when lead nitrate solution is mixed with potassium chloride solution?
What is the product when lead nitrate solution is mixed with potassium chloride solution?
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What is a word-equation in chemistry?
What is a word-equation in chemistry?
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What observation indicates that a chemical reaction has taken place?
What observation indicates that a chemical reaction has taken place?
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What happens to a substance that gains oxygen during a reaction?
What happens to a substance that gains oxygen during a reaction?
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Which of the following is a characteristic of redox reactions?
Which of the following is a characteristic of redox reactions?
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Why is using chemical formulae instead of words beneficial in chemical equations?
Why is using chemical formulae instead of words beneficial in chemical equations?
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What happens when zinc granules react with hydrochloric acid?
What happens when zinc granules react with hydrochloric acid?
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Where are the reactants typically placed in a chemical equation?
Where are the reactants typically placed in a chemical equation?
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Which activity corresponds to the formation of hydrogen gas by the action of dilute sulphuric acid on zinc?
Which activity corresponds to the formation of hydrogen gas by the action of dilute sulphuric acid on zinc?
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What is the purpose of mentioning the caution to handle the acid with care in Activity 1.3?
What is the purpose of mentioning the caution to handle the acid with care in Activity 1.3?
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Which part of a chemical equation indicates the direction of the reaction?
Which part of a chemical equation indicates the direction of the reaction?
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What does it mean if the number of atoms of each element is the same on both sides of a chemical equation?
What does it mean if the number of atoms of each element is the same on both sides of a chemical equation?
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In a chemical equation, where are the products usually positioned?
In a chemical equation, where are the products usually positioned?
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