apch01_sfcalcnotes07 - South Pasadena AP Chemistry Name _...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
South Pasadena AP Chemistry Name ____________________________________ Date _________ Period _____ 1 Matter and Measurements SIGNIFICANT FIGURES A. When taking measurements all certain digits plus the first uncertain number are significant. Example : Your bathroom scale weighs in 10 Newton increments and when you step onto it, the pointer stops between 550 and 560. Your look at the scale and determine your weight to 557 N. You are certain of the first two places, 55, but not the last place 7. The last place is a guess and if it is your best guess it also is significant. B. When given measurements, the numbers that are significant are the digits 1-9 and the 0 when it is not merely a place holder. 1. When 0’s are between sig. fig., 0’s are always significant. Example : 101 has 3 sig. fig. and 34055 has 5 sig. fig. 2. When the measurement is a whole number ending with 0’s, the 0’s are never significant. Example
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

apch01_sfcalcnotes07 - South Pasadena AP Chemistry Name _...

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