Measuring & Units
The measuring system used by scientists around the world.
What is SI or the metric system?
The number of significant figures in 0.09405 g/mL.
What is 4 significant figures?
The density of water with a volume of 20.00 mL & a mass of 19.996 g (in correct significant digits & units).
What is 0.9998 g/mL?
The (absolute) percent error equation.
What is %error= |(accepted value - your value)/accepted value| x 100?
The value of 708 g in 3 significant digits & in scientific notation (with correct units).
What is 7.08 x 102 g?
The two required components of every measurement.
What is a number & a unit?
The definition of precision.
What is the degree of exactness of a measurement?
The mass of a box with density of 6.21 g/mL & a volume of 0.25 mL (in correct significant digits & units).
What is 1.6 g?
The definition of accuracy.
What is the numerical value of how close a measured value is to the expected/accepted value?
The value of 0.0000005814 ms in 4 significant digits & in scientific notation (with correct units).
What is 5.814 x 10-7 ms?
The fundamental units for mass, length, & time.
What is kilogram, meter, & second?
The determining factor of the number of significant figures when adding/subtracting measurements.
What is the least precise measurement/decimal place?
The volume of mercury with a density of 13.534 g/mL & a mass of 10.0 g (in correct significant digits & units).
What is 0.739 mL?
Two sources of uncertainty in measurements.
What are the designs of an instrument & how you use an instrument?
The value of 67,904 hm in 2 significant digits & in scientific notation (with correct units).
What is 6.8 x 104 hm?
The amount of picobytes in 0.00355 Tb.
What is 5.55 x 1021 pb?
The answer to this expression with correct number of significant digits & units.
(86.00 cm)(3.228 cm)(0.37 cm)
What is 1.0 x 102 cm3
The mass of a car with density 2.5 kg/mL & volume 30 L (in correct significant digits, in scientific notation, & in grams).
What is 8 x 107 g?
The percent error of an experiment if the accepted density value for mercury is 13.534 g/mL & your experimental value is 13.222 g/mL (in correct significant digits & units).
What is 2.31 %?
The value of 0.00821 Ts in 6 significant digits & in scientific notation (with correct units).
What is 8.21000 x 10-3 Ts?
The density of antimony (6697 kg/L) in g/mL.
What is 6.697 g/mL?
The answer to this expression with correct number of significant digits & units.
(796.13 cm + 12.223 m)/(0.725 s + 11.32 s)
*A solid will float on any liquid that is denser than the solid
The liquid(s) which calcite will float on if the calcite is 12.5 cm3 & its mass is 33.93 g.
Acetone (density = 0.785 g/mL), Water (density = 0.998 g/mL), Methylene bromide (density = 2.497 g/mL), Bromine (density = 3.119 g/mL), & Mercury (density = 13.534 g/mL).
The percent error of an experiment where the experimental mass of a sample of iron was 437 g and the accepted measurement should have been 1.02 kg (in correct significant digits & units).
What is 57.2%?
The total mass of 5.50 x 1023 electrons if the mass of one electron is
9.109 x 10-31 kg.
What is 5.01 x 10-7 kg?