Balanced Chemical Equations

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10 Std - Chemical Reactions and Equations

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Balanced Chemical Equations


Balanced Chemical EquationsVersión en línea 10 Std - Chemical Reactions and Equations por pifly .. 1 Why is it important to balance a chemical equation? a To reduce the reaction time b To satisfy the Law of Conservation of Energy c To satisfy the Law of Conservation of Mass d To make the equation look simple 2 Which of the following is a balanced chemical equation? a H₂ + Cl → HCl b Fe + H₂O → Fe₃O₄ + H₂ c Zn + H₂SO₄ → ZnSO₄ + H₂ d H₂ + O₂ → H₂O 3 What is a skeletal chemical equation? a A chemical equation with symbols and balanced atoms b An equation with incorrect chemical symbols c An unbalanced chemical equation d A chemical equation that uses word format 4 What is the physical state of water when used as steam in a reaction? a (l) b (g) c (aq) d (s) 5 Which of the following symbols represents an aqueous solution? a (g) b (aq) c (l) d (s) 6 What is the coefficient of Fe in the balanced equation: Fe + H₂O → Fe₃O₄ + H₂? a 1 b 2 c 3 d 4 7 What is the method used to balance chemical equations called? a Guessing method b Observation method c Hit-and-trial method d Equalization method 8 In the reaction: Fe + 4H₂O → Fe₃O₄ + 4H₂, which element is balanced last? a Oxygen b Hydrogen c Iron d Water 9 In the chemical equation Zn + H₂SO₄ → ZnSO₄ + H₂, which of the following is a product? a Zn b H₂SO₄ c H₂ d ZnSO₄ 10 What does the law of conservation of mass state? a Energy can neither be created nor destroyed b Mass remains constant if temperature is constant c Mass can be created during combustion d Mass can neither be created nor destroyed in a chemical reaction

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Balanced Chemical Equations

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Balanced Chemical EquationsVersión en línea

por pifly ..

Why is it important to balance a chemical equation?

Which of the following is a balanced chemical equation?

What is a skeletal chemical equation?

What is the physical state of water when used as steam in a reaction?

Which of the following symbols represents an aqueous solution?

What is the coefficient of Fe in the balanced equation: Fe + H₂O → Fe₃O₄ + H₂?

What is the method used to balance chemical equations called?

In the reaction: Fe + 4H₂O → Fe₃O₄ + 4H₂, which element is balanced last?

In the chemical equation Zn + H₂SO₄ → ZnSO₄ + H₂, which of the following is a product?

What does the law of conservation of mass state?