The closeness of a measured value to its known or accepted value.
What is accuracy?
100
Error.
What is the difference between an experimental value and an accepted value?
100
The number of sig figs in:
130 mL
What is 2?
100
A type of matter that has a definite volume but not a definite shape, and is not compressible.
What is a liquid?
100
3 examples of physical properties and 3 examples of chemical properties
What are:
physical- color, melting point, hardness, density, volume...
chemical- flammability, ability to rust, heat of combustion, reactivity...
200
Precision
What is the closeness of a set of measurements to each other?
200
Two sources of error.
What are human skill and technique and instrument precision.
200
The number of sig figs in:
90908.2 mol
What is 6?
200
Definition of a gas.
What is a type of matter that has no definite shape or volume, is compressible, particles moving very fast.
200
Definition of the Law of Conservation of Mass
What is Mass(reactants) = Mass(products) or in a chemical reaction matter is neither created nor destroyed.
300
A target showing 5 darts that are accurate but not precise, and a target showing 5 darts that are precise but not accurate.
(see drawings)
300
The equation for percent error.
What is % error = | experimental - accepted | / accepted x 100
300
Round to 2 sig figs:
0.0003020
What is 0.00030?
300
Particle diagrams of a solid, liquid, and gas.
(see drawings)
300
Phase changes are an example of these. Give 2 more.
What are physical changes? Breaking something or crumpling it up? (Answers may vary)
400
A data set: 4.64 cm, 4.63 cm, 4.65 cm, 4.64 cm
Accepted value: 4.13 cm
What is a precise but not accurate data set.
400
The percent error if you measure a density of 1.2 g/mL and the accepted value is 1.43 g/mL. (Sig figs count!)
What is 16% error?
400
3000 cm + 1.22 cm =
What is 3001 cm?
400
The reason gas particles fill the volume of the container they are in.
What is gases contain very fast moving, high energy particles?
400
3 indications of a chemical change.
What are color change (not dilution or mixing), gas formation, temperature change (not from heating), change in physical and chemical properties...
500
The area of your whiteboard. (Sig figs count!)
What is 1135 cm
500
The percent error of the following series of measurements if the accepted value is 2.3 cm
3.3 cm, 1.7 cm, 1.4 cm, 2.9 cm
(Accurate or precise?)
What is 1.1% error. Accurate but not precise.
500
(6.23 x 10^5 g) / (4 x 10^-3 mL)
Units and sig figs must be correct!
What is 2 x 10^8 g/mL?
500
The names of all 6 phase transitions.
What are freezing (liquid to solid), melting (solid to liquid), evaporation (liquid to gas), condensation (gas to liquid), sublimation (solid to gas), and deposition (gas to solid)?
500
Definitions of extensive and intensive properties. An example of each.
What are:
Extensive property- depends on the amount (mass, length, volume)
Intensive property- doesn't depend on the amount (color, hardness, density)