MidtermF08_Answers_PartB

MidtermF08_Answers_PartB - reaction between me in my...

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CHEM 1300 Midterm Exam, Fall 2008 Page 1 of 1 Part B: Short Answer Name: ____________________________ Student Number: ________________________ 1. Balanced the chemical equation for the following neutralization reaction: 2 Al(OH) 3 (aq) + 3 H 2 SO 3 (aq) 6 H 2 O(l) + 1 Al 2 (SO 3 ) 3 (aq) 2. How many protons, neutrons, and electrons are in the iron(III) ion, 56 Fe 3+ ? 26 protons 30 neutrons 23 electrons 4. I am a third period element that does not like to be alone. In my natural state I like to pair up with another atom of my type to form diatomic molecules in the gas phase. I react vigorously with alkali metals to form ionic compounds. Write a balanced chemical equation for the
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Unformatted text preview: reaction between me in my diatomic form and an alkali metal residing in the fourth period. Answer: Cl 2 + 2 K → 2 KCl 5. Write the ground state electron configuration for Ni. Answer: [Ar] 4s 2 3d 8 OR: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 8 6. Draw a Lewis dot structure for: H 2 CO O C H H O H H C OR 3. The element potassium consists of only three naturally occurring isotopes. What is the mass of potassium-41, written to three significant figures? (See the table below.) Isotope Percent Abundance Mass (amu) potassium-39 93.2581 % 38.963707 potassium-40 0.0117 % 39.963999 potassium-41 ? ? Answer: 41.0 amu...
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