34 Ex03 Review - The cell reaction for a Ni/Cd battery can...

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1 The cell reaction for a Ni/Cd battery can be written as 2Ni(OH) 3 (s) + Cd(s) 2Ni(OH) 2 (s) + Cd(OH) 2 (s) Which statements about a Ni/Cd battery is correct? I) Ni is oxidized, and Cd is reduced. II) Cd is oxidized, and Ni is reduced. III) Ni(OH) 3 is the oxidizing agent. IV) Cd is the oxidizing agent. A) I an III B) II and IV C) I and IV D) II and III 2 Room Assignments for Exam 3 Tuesday, April 20th, 8:30 –10:00 PM Solar ID Room 000000000 –106760925 Javits100 Main Floor 106760926 –107004419 Javits100 Balcony 107004420 –107057943 Earth & Space Science 001 107057944 –107096979 Old Chemistry 116 107096980 –107127969 Javits102 107127970 –107171067 Harriman Hall 137 107171068 –107241153 Engineering 143 107241154 –107272977 Engineering 145 107272978 –999999999 Javits110
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3 Electrical Units You need to know these! Electrical potential: Volt, V The voltage supplied to your house is 120 V AC. Electrical charge: Coulomb, C e = 1.6 x 10 -19 C or 96,485 C/mol Current: Ampere, 1 A = 1 C/s Typical house circuits are rated for 20 A Energy: Joule, 1 J = 1 C x 1 V 4 J heat 1 g water 1 o C Power: Watt, 1 W = 1 J/s = 1 A x 1 V Common hair dryers use around 1500 W of power And draw close to 15 A of current 4 The local lighting company charges $0.10 per kilowatt hour. It is charging for A) Voltage provided B) Electrical charge delivered (i.e. number of electrons) C) Current used D) Power used E) Energy used
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