Quiz 2 09/04/08.

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Presentation transcript:

Quiz 2 09/04/08

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

Question 2 What is the atomic number of 4He?

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

Question 4 How many protons are present in 32S?

Question 5 How many neutrons are in Sc-45?

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