Practice FinalName________________________________________CHEM 1410 Summer 2012This practice final...

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Practice FinalName________________________________________CHEM 1410 Summer 2012This practice final may be completed and turned in by 8/1 as an extra credit assignment. All answers shouldshow all workandinclude units and correct significant figures. The answers to this will be given in class on 8/6 as a review for the final exam. This will not be accepted late!1.Identify each of the following as an element, compound, homogenous mixture or heterogeneous mixture:(Ch. 3.4)a.Lemonade (without the pulp)_________________________________________b.Fully rusted nail_________________________________________c.Table salt_________________________________________d.Cl2_________________________________________e.Steel_________________________________________2.Fill in the missing numbers in the chart below:(Ch. 2.2 –2.8)Decimal NotationScientific NotationNumber of significant figures0.00003500a._________________________b.________________________c.______________________7.48 x 106d.________________________5600000000e._________________________53.What is the density, in g/mL, of a piece of metal that weighs 0.408 kg and displaces XXXXXXXXXXL of water?(Ch. 2.9)
4.For the following processes, tell whether each is physicalor chemical.(Ch 3.6)a.Mixing salt and water________________________b.Iron rusting________________________c.Paper burning________________________d.Mothballs subliming________________________e.Diluting orange juice________________________5.Choose the answer for each statement from the answers given below:(Ch. 4.3, 4.4, 4.8)Answers: 27Al35Cl ¯23Na+30P1H+a.Has a mass number equal to 27_____________b.Has 10 electrons_____________c.Has a nuclear charge of +15_____________d.Has a number of electrons equal to that of neutrons, but different than that of protons____________e.Has no electrons____________6.Write atomic symbols for the following neutral isotopes.(Ch. 4.8)a.Lead-207__________________b.Cobalt-60__________________c.Uranium-235__________________d.Strontium-90__________________e.Sulfur-35__________________

005_btp985k-4vcniy2o.pdf

Robert · Accepted Answer

31)  Volume of the solution = 500 mL 
 Density = 1.08 g/mL 
 Thus – 
 Mass of the solution = (500 mL)(1.08 g/mL) = 540 g 
 This solution has 10% NaOH by mass, so amount needed to prepare this solution 
 = (540 g)(10/100) 
= 54 g
 
32) From the given information – 
 Number of mols of NiCl2 = (0.0112 M)(0.134 L) = 0.00150 mol 
 Thus – 
 Number of mols of K3PO4 required = (0.00150 mol)((2/3) = 0.001 mol 
 Thus – 
 Volume of K3PO4 required = (0.001 mol) / (0.225 mol/L) = 0.0044 L = 4.4 mL 
 
 
33)  Amount of H2SO4  required to produce 15.0 g H2  
     2 2 42 2 4
2 2
1molH 3molH SO
= 15.0g H =7.5molH SO
2.

Practice FinalName________________________________________CHEM 1410 Summer 2012This practice final may be completed and turned in by 8/1 as an extra credit assignment. All answers shouldshow all...

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