EXAM PROBLEM #6 Instructions: Choose your answers from the…

EXAM PROBLEM #6 Instructions: Choose your answers from the dropdown boxes. There is no need to write anything on your “work” pages. Question: Classify each of the following as a PHYSICAL or CHEMICAL change. A.   Food is converted into new skin cells after you eat.   B.   When heated, potassium chlorate decomposes into potassium chloride and oxygen.   C.   Kerosene burns in an oil lamp.  D.   Water vapor from the air condenses on a cold glass of iced tea.  

EXAM PROBLEM #12 Instructions: Type your answer to the foll…

EXAM PROBLEM #12 Instructions: Type your answer to the following question in the textbox below. Show all calculations on your “work” page.  Label which problem it is (#12). Reminder:  Values for constants are listed in the document Conversions and Constants to Memorize document. Question: Certain photons have an energy of 22.3 kJ/mol.  What is the frequency for these photons?  

EXAM PROBLEM #4 Instructions: Choose the ONE best answer be…

EXAM PROBLEM #4 Instructions: Choose the ONE best answer below. There is no need to write anything on your “work” pages. Question: Which model of the atom predicts that electrons can absorb energy to move to a higher energy level, causing the atom to be in an “excited” state?