Worksheet 1 - Chem 142, Winter 2012 Name _ Group Activity...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 142, Winter 2012 Name ______________________ 1 of 4 Group Activity 1: Significant Figures, Units, and Conversion Factors 1. A. How many significant figures are in each of the following numbers? 5.40 ________ 3.97 x 10 -5 ________ 30000 ________ 250. ________ 1.4895 ________ 1.400 ________ 235.40 ________ B. Complete the following calculations to the appropriate number of sig. figs.: 234.52 + 25.2 = 1420 x 320. = (6.274 x 10 3 ) x (1.56 x 10 -2 ) = 529 1.30 = 430. - 44.67 = (1.343 x 10 2 ) + (1.5654 x 10 2 ) =
Background image of page 1

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

View Full DocumentRight Arrow Icon
Chem 142, Autumn 2011 2 of 4 2. The average speed ( u rms ) of a collection of gaseous molecules is given by the following formula: M RT u rms 3 where T is the temperature of the sample, M is the molar mass of the gaseous compound, and R is a constant related to the distribution of the available kinetic energy over the molecules in the sample ( R = 8.314 J mol -1 K -1 ). What is u rms for nitrogen gas ( M = 28.02 g mol -1 ) at 298.15 K?
Background image of page 2
Chem 142, Autumn 2011 3 of 4 3. Methanol (methyl alcohol or wood alcohol) is a potential automotive fuel, either in
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/18/2012 for the course CHEM 142B taught by Professor John during the Winter '11 term at University of Washington.

Page1 / 4

Worksheet 1 - Chem 142, Winter 2012 Name _ Group Activity...

This preview shows document pages 1 - 4. Sign up to view the full document.

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