Quiz 5-solutions - Version 079 – Quiz 5 – Laude –...

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: Version 079 – Quiz 5 – Laude – (52390) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 5.0 points Consider the reaction: H 2 CO 3 ( aq )-→ CO 2 ( aq ) + H 2 O( ℓ ) If it has a half-life of 1 . 6 s , how long will it take a system with an initial [H 2 CO 3 ] of 1 M to reach a [H 2 CO 3 ] of 125 mM? 1. 3 . 2 s 2. . 4 s 3. . 8 s 4. not enough information 5. 6 . 4 s correct Explanation: 1 · . 5 x = 0 . 125 M x = 4 half lives 4 · 1 . 6 s = 6 . 4 s 002 5.0 points Consider the elementary reaction: CH 2 O( g ) + O 2 ( g )-→ CO 2 ( g ) + H 2 O( g ) If k = 5 . 4 × 10 4 M- 1 · s- 1 , and there is ini- tially 1 . 334 M O 2 , how long will it take for the O 2 concentration to reach 0 . 443 M ? 1. 17 μ s 2. 20 μ s 3. 28 μ s correct 4. 16 μ s Explanation: 1 [O 2 ] = 1 [O 2 ] + kt 1 . 443 = 1 1 . 334 + ( 5 . 4 × 10 4 ) t t = 0 . 00002792 s 003 5.0 points Express the rate of the following reaction in...
View Full Document

This note was uploaded on 05/04/2009 for the course CH 52390 taught by Professor Laude during the Spring '09 term at Adams State University.

Page1 / 3

Quiz 5-solutions - Version 079 – Quiz 5 – Laude –...

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