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Past Exam for CHEM 002 - General Chemistry I with Vidensek at UC-Merced (UC Merced)

Exam Information

Material Type:Mid-Term
Professor:Vidensek
Class:CHEM 002 - General Chemistry I
Subject:Chemistry
University:University of California-Merced
Term:Fall Semester 2010
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Name: ___________________________ Date: _____________ Please be sure that any chemical equation given in the questions below is balanced before you attempt to answer the respective question. 1) What is the molar concentration of a solution in which 75.02 g of Na CrO was 2 4 HNO + K CrO + Fe(NO ) KNO + Fe(NO ) + Cr(NO ) + H O completely dissolved in 100.00 mL of water and brought to a final solution volume of 250.00 mL? a) 1.853 M b) 1.324 M c) 4.318 M d) 1.592 M e) 2.003 M 2) Considering the unbalanced REDOX reaction below: 3 2 4 3 2 ? 3 3 3 3 3 2 What will the coefficients be for K CrO and Fe(NO ) , respectively, when the equation 2 4 3 3 a) 4 and 4 b) 1 and 3 c) 3 and 8 d) 2 and 2 e) 7 and 5 is balanced? 3) What is the molar concentration of a H PO solution if 150.00 mL of the solution was 3 3 NaOH + H PO Na PO + H O required to neutralize 75.00 mL of Na...
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