Properties of matter
_____ properties depend on the amount of matter that is present
Extensive
_____ are the horizontal rows on a periodic table
Periods
What is the SI unit for mass and length
grams and meters
Identify the number of significant digits in the following number: 0.0180
3
Name two different branches of chemistry
Organic, inorganic, biochemistry, physical chemistry
If a material is tested and every sample has exactly the same properties and the same composition, it is a ____________
a. mixture
b. pure substance
c. compound.
d. molecule
pure substance
Elements share chemical properties that are within the same _____.
Groups
Convert 53 cm -> m using dimensional analysis
0.53 m
Identify the number of significant digits in the following number: 3008
4
What is the difference between accuracy and precision?
Accuracy is how close a set of numbers is to the accepted value; Precision is how close the set of numbers are to each other
Which state of volume has a definite volume and an indefinite shape?
Liquid
What elements share properties of both metals and nonmetals? Give an example of an element that fits this category
metalloids; boron, silicon, germanium, arsenic, antimony, tellerium, astatine, polonium
Convert 11,312 mg -> kg
0.011312 kg
Solve with sig figs.
8.1419 + 23.474 + 8.46
40.08
What is density, and what is its label?
the ratio of an object's mass to its volume
g/mL
What are the two types of mixtures, and describe each one.
Homogeneous: uniform composition
Heterogeneous: nonuniform composition
Give one example of a metal, nonmetal, and metalloid
answers may vary
Convert 0.612 mL -> L
0.000612 L
Solve with the proper number of Sig Figs
224 x 6.84 x 20
31,000
Differentiate inversely and directly proportional
Directly proportional occurs when two quantities divide to get a constant value: Inverse occurs when two quantities multiply to form a constant
Give an example of each of the following
- Extensive & Intensive Property, Physical & Chemical change
Extensive: volume, mass, amount of energy
Intensive: melting and boiling point, color, density
Physical: scrapping, cutting, grinding, change of state
Chemical: burning, any chemical reaction, iron rusting
Give at least 3 properties of metals.
Malleable, Ductile, Good conductors of electricity, Most abundant, Solid at room temperature
Jim measures the density of water to be 1.16 g/mL. He later looks up the true density of water to be 0.997g/mL. What is his percent error?
16.3%
Solve with the proper number of Sig Figs.
127/42
3.0
What are the three types of research in chemistry, and briefly define each one.
Basic research: conducted for sake of knowledge only and not to meet practical goals
Applied research: used to meet goals defined by specific needs
Technological development: uses existing knowledge to improve quality of life