HW 11 - – Homework #11 – holcombe – 1 This print-out...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: – Homework #11 – holcombe – 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Which type of battery is best for use in heart (cardiac) pacemakers? 1. mercury 2. alkaline 3. nickel-cadmium 4. lithium-iodine correct Explanation: Pacemaker batteries are placed inside the body cavity, so the battery must be small, last a long time and be made of non-toxic materials. Lithium-iodine batteries last up to 10 years. 002 10.0 points In a lead-acid (storage) battery, the cathode is the 1. casing enclosing the entire battery. 2. positive plates, lead/PbO 2 . correct 3. negative plates, lead/spongy lead. 4. H 2 SO 4 electrolyte. Explanation: Reduction occurs at the cathode; the Pb in PbO 2 is reduced to Pb in PbSO 4 . 003 10.0 points What current (in amperes) would be re- quired to produce 19 . 7 g of Au (s) from Au 3+ (aq) in 4 hours?...
View Full Document

This note was uploaded on 11/17/2010 for the course CH 302 taught by Professor Holcombe during the Fall '07 term at University of Texas.

Page1 / 3

HW 11 - – Homework #11 – holcombe – 1 This print-out...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online