WS 1 - 5 NH 3 Cl is dissolved in water to make 150.0mL of...

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Worksheet 1: Fundamentals 1. Give the number of protons, neutrons and electrons in an atom of 1) 3 H 2) 27 Al 3) 238 U 2. Octane, C 8 H 18 , is typically of the molecules found in gasoline,(a) calculate the mass of one octane molecule; (b) determine the number of C 8 H 18 molecules in 1.00mL of C 8 H 18 , the mass of which is 0.82g. 3. Cacodyl, which has an intolerable garlicky odor and is used in the manufacture of cacodylic, a cotton herbicide, has a mass percentage composition of 22.88% C, 5.76% H and 71.36% 4. One step in the refining of titanium metal is the reaction of FeTiO 3 with chlorine gas and carbon. Balance equation for the reaction: FeTiO 3 (s)+Cl 2 (g)+C(s) TiCl 4 (l) +FeCl 3 (s)+CO(s) 5. Write the balanced and net ionic equations corresponding to each of the following reactions: (a) Pb(NO 3 ) 2 (aq)+K 3 PO 4 (aq) Pb 3 (PO 4 ) 2 (s)+KNO 3 (aq) (b) K 2 S(aq)+Bi(NO 3 ) 3 (aq) Bi 2 S 3 (s)+KNO 3 (aq) (c) Na 2 C 2 O 4 (aq)+Mn(CH 3 CO 2 ) 2 (aq) MnC 2 O 4 (s)+NaCH 3 CO 2 (aq)
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6. C 6 H 5 NH 3 Cl is a chloride salt with an acidic cation. (a) if 50.0g C 6 H
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Unformatted text preview: 5 NH 3 Cl is dissolved in water to make 150.0mL of solution, what is the initial molarity of the cation? (b) Write the chemical equation for the proton transfer reaction of the cation with water, identify the acid and the case in this reaction. 7. Determine the oxidation number of the italicized element in each of the following ions: (a) Al O 2-(b) N O 2-(c) SO 3-(d) Ni Cl 4- (e) Br F 3 + 8. Suppose that 25.0 mL of 0.50M K 2 CrO 4 (aq) reacts with 15.0mL of AgNO 3 (aq) completely. What mass of NaCl is needed to react completely with 35.0mL of the same AgNO 3 solution? 9. A chemist wants to extract the gold from 35.25g of AuCl 3 2H 2 O, by electrolysis of an aqueous solution. What mass of gold could be obtained from the sample? 10. A metal forms an oxide with the formula M 2 O 3 , for which the mass percentage of the metal is 69.9%. What is the molar mass of the metal?...
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This note was uploaded on 03/29/2010 for the course CHEMISTRY 230 taught by Professor Gottfried during the Fall '10 term at University of Michigan.

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WS 1 - 5 NH 3 Cl is dissolved in water to make 150.0mL of...

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