u2 - Chemistry Unit 2: Matter and Energy Matter...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Unit 2: Matter and Energy Chemistry
Background image of page 1

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

View Full DocumentRight Arrow Icon
Matter Introductory Definitions matter : anything having mass and volume mass : weight : volume : units: L, dm3, mL, cm3 L3 state of matter : the amount of matter in an object the pull of gravity on an object the space an object occupies solid, liquid, or gas
Background image of page 2
composition : copper: water: properties : -- -- atom : a basic building block of matter what the matter is made of many Cu atoms many groups of 2 H’s and 1 O describe the matter what it looks like, smells like; its mass, temp., etc. how it behaves ~100 diff. kinds
Background image of page 3

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

View Full DocumentRight Arrow Icon
Elements contain only one type of atom 1. monatomic elements consist of unbonded, “like” atoms e.g., 2. polyatomic elements consist of several “like” atoms bonded together diatomic elements: others: Fe, Al, Cu, He H2 O2 Br2 F2 I2 N2 Cl2 P4 S8 “7 7 7”
Background image of page 4
allotropes : different forms of the same element in the same state of matter OXYGEN CARBON oxygen gas ozone elemental carbon graphite diamond buckyball (O2) (O3)
Background image of page 5

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

View Full DocumentRight Arrow Icon
molecule : a neutral group of bonded atoms Description Chemical Symbol Model 1 oxygen atom 1 oxygen molecule 2 unbonded oxygen atoms 1 phosphorus atom 1 phosphorus molecule 4 unbonded phosphorus atoms O O2 2 O P P4 Elements may consist of either molecules or unbonded atoms. 4 P
Background image of page 6
Compounds …contain two or more different types of atoms …have properties that are different from those of their constituent elements Na (sodium): Cl2 (chlorine): explodes in water poisonous gas table salt (NaCl)
Background image of page 7

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

View Full DocumentRight Arrow Icon
Atoms can only be altered by _______ means. Molecules can be altered by ________ means. (i.e., chemical reactions, chemical changes) nuclear chemical e.g., Dehydration of sugar C12H22O11(s) 12 C(s) + 11 H2O(g) Electrolysis of water 2 H2O(l) 2 H2(g) + O2(g) Atomic blast at Hiroshima U Ba Kr neutron “bullet”
Background image of page 8
Every sample of NaCl tastes the same, melts at the same temp., and is 39.3% Na and 60.7% Cl by mass. Compound Composition All samples of a given compound have the same composition.
Background image of page 9

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

View Full DocumentRight Arrow Icon
Phosgene gas (COCl2) is 12.1% carbon, 16.2% oxygen, and 71.7% chlorine by mass. Find # of g of each element in 254 g of COCl2. C: O: Cl: 254 g (0.121) = 30.7 g C 254 g (0.162) = 41.1 g O 254 g (0.717) = 182.1 g Cl
Background image of page 10
= 0.828 A sample of butane (C4H10) contains 288 g carbon and 60 g hydrogen. Find… A. …total mass of sample B. …% of each element in butane C. …how many g of C and H are in a 24.2 g sample 288 g C + 60 g H 82.8% C, 17.2% H = 348 g g 348 C g 288 % C = = 0.172 g 348 H g 60 % H = C: H: 24.2 g (0.828) = 20.0 g C 24.2 g (0.172) = 4.2 g H
Background image of page 11

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

View Full DocumentRight Arrow Icon
has 376 g Cr. How many grams of Cr and O are in a 212 g sample of Cr2O3? 68.4% Cr
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/09/2011 for the course CHEM 110 taught by Professor Sullivan during the Fall '10 term at BYU.

Page1 / 48

u2 - Chemistry Unit 2: Matter and Energy Matter...

This preview shows document pages 1 - 13. Sign up to view the full document.

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