Chem Chap 1 - Chapter 1 Significant figures(sf 1 Make sure that the measured quantity has a decimal point 2 Start at the left of the number and

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: Chapter 1 Significant figures (sf) 1. Make sure that the measured quantity has a decimal point. 2. Start at the left of the number and move right until you reach the first nonzero digit. 3. Count that digit and every digit to its right as significant. Ex- 0.1044g (Four sf) 57,600.s (Five sf) 0.0000007160 cm 3 (Four sf) Macro/Micro/Symbolic 1. What does it look like – Macro 2. Ball and stick model – Micro 3. Chemical formulas – Symbolic Ex- Mg ribbon + Heat I. Macro- Mg ribbon heated, light generated, dull metal left II. Micro- III. Symbolic- (2Mg + O 2 2MgO) Physical/Chemical Changes 1. Physical change- When a substance alters its physical form, NOT composition. Ex- Solid water Liquid water Gas (water vapor) REVERSIBLE! (Heat Added) Gas (water vapor) Liquid water Solid water :D (Cold Added) 2. Chemical change- When a substance is converted into a different substance....
View Full Document

This note was uploaded on 04/03/2008 for the course CHEM 103a taught by Professor Weso during the Fall '08 term at University of Arizona- Tucson.

Page1 / 2

Chem Chap 1 - Chapter 1 Significant figures(sf 1 Make sure that the measured quantity has a decimal point 2 Start at the left of the number and

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