Chemical Equations - Activity 1.1 Word Equation

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Questions and Answers

What is the simplest way to represent the chemical reaction when a magnesium ribbon is burnt in oxygen?

  • Magnesium oxide → Magnesium + Oxygen
  • Magnesium + Oxygen → Magnesium oxide
  • Mg + O2 → MgO (correct)
  • MgO → Mg + O2

In a chemical equation, where are the reactants written?

  • Left-hand side (LHS) (correct)
  • Below the arrow
  • Right-hand side (RHS)
  • Above the arrow

What is the product of the chemical reaction when a magnesium ribbon is burnt in oxygen?

  • Magnesium and Oxygen
  • Magnesium ribbon
  • Magnesium oxide (correct)
  • Oxygen gas

What does the arrow in a chemical equation show?

<p>Direction of the reaction (D)</p> Signup and view all the answers

What happens to a magnesium ribbon when it burns in oxygen?

<p>It changes into magnesium oxide (B)</p> Signup and view all the answers

Which representation is used to show the change of reactants to products in a chemical equation?

<p>Arrow placed between reactants and products (C)</p> Signup and view all the answers

What does a chemical equation represent?

<p>A chemical reaction (C)</p> Signup and view all the answers

In a balanced chemical equation, the number of atoms of each element is:

<p>Equal on both sides (C)</p> Signup and view all the answers

Which law states that mass can neither be created nor destroyed in a chemical reaction?

<p>Law of Conservation of Mass (C)</p> Signup and view all the answers

What does a skeletal chemical equation represent?

<p>An unbalanced chemical equation (D)</p> Signup and view all the answers

Which word-equation can be represented by the chemical equation Zn + H2SO4 → ZnSO4 + H2?

<p>Zinc + Sulphuric acid → Zinc sulphate + Hydrogen (C)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>To make it more concise and useful (D)</p> Signup and view all the answers

According to the given text, what does the law of conservation of mass state?

<p>Mass can neither be created nor destroyed in a chemical reaction (B)</p> Signup and view all the answers

What should be equal on both sides of a balanced chemical equation?

<p>$\frac{\text{Number of atoms}}{\text{Molecules}}$ (C)</p> Signup and view all the answers

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