New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Esraa Hagag

chemistry chem135

Esraa Hagag
Northampton Community College

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

these will cover most of the next week notes
chemistry of life
edward s fleming
Class Notes
25 ?




Popular in chemistry of life

Popular in Chemistry

This 3 page Class Notes was uploaded by Esraa Hagag on Thursday September 22, 2016. The Class Notes belongs to chem135 at Northampton Community College taught by edward s fleming in Fall 2016. Since its upload, it has received 3 views. For similar materials see chemistry of life in Chemistry at Northampton Community College.

Similar to chem135 at Northampton Community College


Reviews for chemistry


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/22/16
Chapter 3 section 3 Temperature:  It is a measure of the heat content of particular substance  Fahrenheit (F)  Celsius ©  Kelvin (K) we use it because there is no negative temperature, lowest temperature is  zero Look at page 27 number 2.4, Page 37 number 2.37, Page 67 number 3.4 Significant figures:  The measured digits that are certain plus one uncertain digit at the end  When measuring something how well we know numerical value depends on the  fines of the measuring scale  The more significant figure we have the more we sure about the number e.g.   bathroom scale measures to ­/+ 1 lb., 138 ­/+ range between 137 to 139, (3)  significant figures. The (8) is uncertain digit  Doctor’s office scale measures to ­/+ 0.1 lb., 137.6 ­/+ range between 137.5 to  137.7, 4 significant figures. The (6) is uncertain digit Rules #1 zeroes at the end of number larger or greater than one are significant only if the  decimal point is explicitly shown Rule #2 zeroes between numbers are significant Rule #3 zeroes after a decimal point are significant if they are to the right of the number Look at page 30 number 2.14 Unit conversions:  Often need to convert one unit into another  Conversion factor (equality) relates unit to each other  Even if we have the equality do we multiply or divide? Use factor label method  dimensional analysis default method  When we multiply or divide number we also need to multiply or divide the units  The units are treated as algebraic terms  The goal is to keep the units we need for answer and cancel other units Medication / poison key terms Dosage: the mass of a substance administrated per kilogram of body weight Units: g/kg, mg/kg, mcg/kg Substance: could be a medicine or a poison Lethal dose 50 (LD50): the dosage which causes death in 50% of a test animal population,  results are not directly transferable between species because of different metabolism Dose: the actual amount of a substance absorbed into a body Routs of entry:   ingestion/oral  injection  inhalation  skin contact/ absorption look at page 45 number 2.54 a, b and number 2.56 a, b, c Density:  It is the mass of certain substances divided by its volume D= m/v               M= d*v               V= m/d The density of pure substance is a constant physical property (at given condition)  Physical properties: is quality of substance that can be shown or demonstrate without altering  the chemical composition of that particular substance Chemical property: is a substance stability/ reactivity regarding a change in composition during a chemical reaction Chemical reaction: is when one or more substance become new and different substances Look at page 49 number 2.60 a, c and number 2.62 a, b Specific gravity: ratio of density of a substance to the density of water Density of water= 1 g/ml Density of mercury= 13.6 g/ml Specific gravity= density of mercury/ density of water= 13.6/1= 13.6 g/ml Hydrometer is used to measure specific gravity Specific gravity= density of sample/ density of water Key measurement terms: Accuracy: is how close the average measure value to true value Precision: is the repeatability of successive measurement of the same property “how close are  these measurements to each other” Error: the difference between the average measured value and the true value 1. Random error: uncontrolled error due to limits on measuring device  Related to the uncertainty digit in measurement  Assume half measurements are too high and half are too low  If we take enough measurements, they cancel out  Average measured value coverage to true value 2. Systematic error: avoidable error due to an off­set in measuring device and/or a  consistent but incorrect measuring technique  High precision automatically leads to high accuracy if there is no  systematic error  Low precision automatically leads to low accuracy even if the average  measure value is close to the true value


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Janice Dongeun University of Washington

"I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.