Chem171Sp08Q2Key

Chem171Sp08Q2Key - 1. Chem 171 Quiz 2 Version A Osmium has...

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Chem 171 Quiz 2 Version A 1. Osmium has a density of 22.6 g/mL. Calculate the mass of a block of osmium that measures 0.0101 m x 0.223 cm x 0.648 cm. 0.0101 m x 100 cm/m = 1.01 m Vol of block = 1.01 cm x 0.223 cm x 0.648 cm = 0.146 cm 3 (mL) Mass in g = 0.146 cm 3 x 22.6 g/mL = 3.30 g 2. Predict whether a reaction will occur in the following case. If there is a reaction write the molecular equation, complete ionic equation, net ionic equation and identify any spectator ions. Pb(NO 3 ) 2 (aq) + 2 KCl (aq) Æ Pb(NO 3 ) 2 (aq) + 2 KCl Æ PbCl 2 (s) + 2 KNO 3 (aq) Pb 2+ (aq) + 2 NO 3 - (aq) + 2K+ (aq) + 2 Cl - (aq) PbCl 2 (s) + 2 K + (aq) + 2 NO 3 - (aq) Pb 2+ (aq) + 2 Cl (aq) PbCl 2 (s) NO 3 - , K + are spectator ions Chem 171 Quiz 2 Version B 1. A cube of an unknown metal measures 1.61 mm on one side. The mass of the cube is 36 mg. Which of the following is most likely the unknown metal? The density of the metals are as follows: rhodium 12.4 g/mL, copper 8.96 g/mL, niobium 8.57 g/mL, vanadium 6.11
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This note was uploaded on 11/03/2010 for the course CHEM 171 taught by Professor Several during the Spring '08 term at Rutgers.

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Chem171Sp08Q2Key - 1. Chem 171 Quiz 2 Version A Osmium has...

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