# Exam 1

 Extensive Properties
 depend on size of sample examples:mass,volume,weight,length
 Intensive Properties
 do NOT depend on sample size examples: color,odor,luster,boiling point
 Dalton’s Atomic Theory
 1.All matter made up of atoms 2.All atoms identical of same element 3. Atoms not created or destroyed by shmeical reaction 4.Atoms combine in single whole number ratios to form compounds
 Chemical Properties
 Chemical reactions with other substances
 Chemical Change
 Examples: rust, oxidization
 Physical Properties
 mass,volume,density,temperature
 Physical Change
 Does NOT change chemical compostition examples; vaporization, melting, seperation
 Law of Definite Proportions
 All samples of the same compound always contain the same proprtions by mass of the component elements
 Matter
 anything that occupies space and has mass
 Energy
 Capacity to do work and has NO mass
 Homogenous Mixture
 uniform compostion example: salt water
 Hetrogeneous Mixture
 NOT uniform throughout Example: sandwich, choclate chunk ice cream
 Law of the Conservation of Mass
 Mass is not created or destroyed in a chemical reaction
 Law of the conservation of Energy
 energy can be converted or transfered but NOT created or destroyed
 Milli
 10-3 1000mg=1g
 deci
 10-1  10dm=1m
 Centi
 10-2 100cm=1m
 Kilo
 10 3 1kg=1000g
 SI UNit for Length
 Meter (m)
 SI UNit for  Mass
 Kilogram (Kg)
 SI UNit for  Time
 Second (s)
 SI UNit for  Temperature
 Kelvin (K)
 Celsius to Farenheight
 tc=5/9 (tf-32)
 Farenhight to celsius
 tf=9/5tc (+32)
 Kelvin to Celsius
 tk=tc+273
 Metaloids
 physical properties of a metal, but chmeical properties of a nonmetal
 WHo is responsible for the mass/weight of an atom?
 Protons and Neutrons
 What is the Atomic Number?
 how many protons are in the atom
 What is the Atomic Mass?
 The # of protons +the #of neutrons
 What is the Nuclear Charge?
 The charge of the nucleaus (protons)
 What is the atomic charge?
 In a stable molecule it hould be zero.
 General Formula for weighted average
 [Mass of isotope 1] x (abundence/100%) +        [Mass of Isotope 2] x (abundence/100%)
 Kinetic Energy Formula
 mv2/2
 how many cm in 1 in?
 2.54
 How many pounds in a Kg?
 2.2
 How many Liters in 1 gallon?
 3.78
 how many inches in a meter?
 39.4
 how many joules in a calorie?
 4.184
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