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Chemistry Quiz: Stoichiometry and Atomic Structure

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  1. Quiz 2 09/04/08

  2. Question 1 • Methane (CH4) and oxygen (O2) react to form carbon dioxide (CO2) and water (H2O). What mass of water is formed if 3 g of methane reacts with 12 g of oxygen to produce 8 g of carbon dioxide? The reaction of interest is: CH4 + O2 → CO2 + H2O • 7 g • 8 g • 12 g • 15 g

  3. Question 2 • What is the atomic number of 4He?

  4. Question 3 • What is the mass number for Ca-40?

  5. Question 4 • How many protons are present in 32S?

  6. Question 5 • How many neutrons are in Sc-45?

  7. Question 6 • How many electrons are found in a neutral atom of 14C?

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