Language of Chemistry - Significant Figures and Rounding Flashcards Preview

General Chemistry > Language of Chemistry - Significant Figures and Rounding > Flashcards

Flashcards in Language of Chemistry - Significant Figures and Rounding Deck (7)
Loading flashcards...
1
Q

significant figures - counting

A
  • 1: non-zero numbers are always significant
  • 2: zeros between non-zero numbers are always significant
  • 3: all trailing or final zeros to the right of the decimal are significant
  • 4: placeholder zeros are not significant (use scientific notation to eliminate confusion)
  • 5: counting numbers and constants are not considered in calculations as significant figures
2
Q

173.5

A
  • 4 s.f.
3
Q

3.05

A
  • 3 s.f.
4
Q

3.1000

A
  • 5 s.f.
5
Q

0.0021

A
  • 2.s.f.
6
Q

2,500,0000

A
  • 2.s.f
7
Q

rounding numbers

A
  • 1: if digit to right of last significant figure is less than 5, do not change last significant figure
  • 2: if digit to right of last significant figure is greater than 5, increase last significant figure by one

Decks in General Chemistry Class (113):