practiceexam20 - City College, Chemistry Department...

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City College, Chemistry Department Chemistry 10301, sections T, T2, T3, Prof. T. Lazaridis First Midterm exam, Oct. 1, 2009 Name (last name first): ___________________________________ I.D. Number: ____________________________________________ Workshop leader: ________________________________________ Note: There are 7 questions in this exam (check both sides of the sheet). Fill in your answer in the blank space provided immediately following each question. Half a point will be subtracted every time you report a numerical result with an incorrect number of significant figures. A copy of the periodic table is attached. Good luck! 1. a. (4) What is the chemical formula of magnesium phosphate? Mg 3 (PO 4 ) 2 b. (4) What is the name of the compound KClO 4 ? Potassium Perchlorate c. (4) How many protons and electrons does the sodium ion have? Na + : 11 protons, 10 electrons d. (4) What is the molar mass of PbCO 3 ? 207.2+12.01+3*16.00= 267.2 e. (4) Give the name of the elements with the following atomic symbols: Hg: Mercury P: Phosphorus F: Fluorine Mn: Manganese
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2. Write a balanced equation for each of the following reactions (it is not
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This note was uploaded on 07/21/2011 for the course CHEM 111 taught by Professor Sawyers during the Spring '11 term at Virginia College.

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practiceexam20 - City College, Chemistry Department...

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