1. Chemical foundations

Measurements

measurement

units

abbr.

mass

grams

volume

liters

distance

meters

temperature

degrees Celsius

Kelvin

℃

There are no rows in this table

⁠

all non-zero digits are always significant

captive zeros (in-between) are always significant

leading zeros are never significant

trailing zeros are sometimes significant

no decimal point: not significant

decimal point: all significant

multiplication and division

same number of significant figures as least precise measurement

300.0 ⨉ 62 = 18600 → 19000

3 significant figures ⨉ 2 significant figures = 3 significant figures

round to 2 significant figures

addition and subtraction

same number of decimal places as least precise measurement

1.10 + 3.334 = 4.434 → 4.43

2 decimal places + 3 decimal places = 3 decimal places

round to 2 decimal places

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