Sample Questions Covered in Lecture 10-18-10

# Sample Questions Covered in Lecture 10-18-10 - 4.180 J/g C)...

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Sample Questions 1) What mass of Na 2 CrO 4 (molar mass: 161.98 g/mol) is required to precipitate all the silver ions from 75.0 mL of a 0.100M solution of AgNO 3 . The balanced reaction equation is shown below. Answer to 3 significant figures. Na 2 CrO 4 (aq) + 2AgNO 3 (aq) Ag 2 CrO 4 (s) + 2NaNO 3 (aq) 2) In the following reaction: PbO + CO Pb + CO 2 What is the reducing agent ? (Multiple choice – pick one) 1. Pb 2. PbO 3. CO 2 4. CO 5. C 6. O 3) A block of copper (sp. heat 0.385 J/g °C) initially at 50.0°C is dropped into 30.0g of water (sp.heat
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Unformatted text preview: 4.180 J/g C) in a calorimeter. The temperature of water rises from 20.1C to 23.2C. Calculate the mass of the copper block. (Report answer to 1 decimal place) q = m x sp. Heat x T 4) Given the following data: NH 3 (g) N 2 (g) + 3/2 H 2 (g) H = 46 kJ 2 H 2 (g) + O 2 (g) 2 H 2 O (g) H = 484 kJ Calculate H for the reaction: 2 N 2 (g) + 6 H 2 O (g) 3 O 2 (g) + 4 NH 3 (g) Report to the closest whole number....
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## This note was uploaded on 11/09/2011 for the course CHEM 161 taught by Professor Vacillian during the Fall '08 term at Rutgers.

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