Counting Sig Figs
How many sig figs are in 0.002580?
4
Convert 5200 into scientific notation
5.2 x 103
What is the rule for rounding when we add/subtract?
Round to the lowest number of decimal places
List out the metric prefixes from largest to smallest
Kilo Hecto Deca (base) Deci Centi Milli
Why do we use the S.I. system in science?
Easy to convert because it is multiples of 10.
Universal
Consistency
How many sig figs are in 5.24 x 10-2?
3
Convert 8.6477 x 104 into standard notation
86,477
What is the rule for rounding when we multiply/divide?
Round to the lowest number of sig figs
Convert 62.5 L into cL
Round your answer have to the same number of sig figs as in the given value.
6250 cL
The "centi" prefix represents a number that is ____ of the base unit
1/100th
What do we call zeros that are at the front of the number? AND when are they significant?
Leading Zeros. They are NEVER significant.
Convert 0.006830 into scientific notation
6.830 x 10-3
Calculate 5.4 + 10.825
16.2
Convert 982 m2 into km2
Round your answer have to the same number of sig figs as in the given value.
0.000982 km2
What is the symbol for the base unit of temperature, Kelvin?
K
What do we call zeros that are at the end of the number? AND when are they significant?
Trailing zeros. They are only significant if there is a decimal point in the number.
Calculate (4.0 x 105) / (2.5 x 102)
1,600 or 1.6 x 103
Calculate (6.3)(15.4)(8)
800
325 mg → ounces Note: 28.35 g = 1 ounce
Round your answer have to the same number of sig figs as in the given value.
0.0115 oz
In the SI system, what unit measures solid volume?
Cubic units. Ex) m3 or cm3
How many sig figs are in 0000685475000. ?
9
Calculate (1.8 x 102) x (2.53 x 106)
460,000,000 or 4.6 x 108
Calculate (852)(2.1)/10
200
75.0 miles/min→ km/hr Note: 1.609 km = 1 mile
Round your answer have to the same number of sig figs as in the given value.
7,240 km/hr
g/mL is an example of units that measures what quantity?
Density