chemistry test 2 mp 1 10513
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how to perform metric conversions
 1) write exponent for prefix given
 2)subtract the exponent
 3) move decimal point over in direction & distance of the difference

what is a significant figure
includes all known digits and one that is estimated

are digits 19 always sig figs
yes

are 0s to the left of (non zero digit) significant
Never

are 0s in the middle of non zero digits always sig fig
yes always

are zeros to the right of (19) sig figs
Sometimes ( only if there's a decimal point)

How do you add / subtract with sig figs
 1) line up decimal point
 2)add or subtract
 3)sum or difference must have the same number of digits after the decimal point as the measurement with the fewest digits after the decimal point
(ex 39.4836.096= 36.096=36.10)

how do you multiply and divide with sig figs
 1) multiply or divide
 2) product or quotient must have the same # of sig figs as the measurement with the fewest # of sig figs

accuracy
how close a measured value is to an accepted value

precision
how close a series of measurements are to each other.