Chem 101
1. significant figures: all the digits in a measured number including one
estimated digit
2. does the 0 count as a sig. fig?
29.05
0.0245
39.50
620.
2,570
0.0008
3.7500
1,245,500: 29.05=yes
0.0245=no
39.50=yes
620.=yes
2,570=no
0.0008=no
3.7500=yes
1,245,500=no
3. What is the volume in cubic centimeters of a piece of gold whose mass is
5.23 g? The density of gold is 19.3 g/cm3.: 0.271
cm3 5.23 g X 1cm3/19.3 g =0.271 cm3 4. How many
sig. figs?
34.08
0.0054
260.00
260: 4
2
5
2
5. What is the sig. fig rule for multiplication/division?: The answer has the
same number of sig. figs as the original number with the fewest sig. figs.
6. What is the sig. fig rule for addition/subtraction?: The answer has the
same number of decimal places as the original number with the fewest decimal
1/3
1. significant figures: all the digits in a measured number including one
estimated digit
2. does the 0 count as a sig. fig?
29.05
0.0245
39.50
620.
2,570
0.0008
3.7500
1,245,500: 29.05=yes
0.0245=no
39.50=yes
620.=yes
2,570=no
0.0008=no
3.7500=yes
1,245,500=no
3. What is the volume in cubic centimeters of a piece of gold whose mass is
5.23 g? The density of gold is 19.3 g/cm3.: 0.271
cm3 5.23 g X 1cm3/19.3 g =0.271 cm3 4. How many
sig. figs?
34.08
0.0054
260.00
260: 4
2
5
2
5. What is the sig. fig rule for multiplication/division?: The answer has the
same number of sig. figs as the original number with the fewest sig. figs.
6. What is the sig. fig rule for addition/subtraction?: The answer has the
same number of decimal places as the original number with the fewest decimal
1/3
