Unit 1: Introduction to Chemistry Study Guide
In the scientific method, _____ is the step in which experimental results are used to decide the validity of each hypothesis.
Analysis
In compound the elements are _____ together, whereas in a mixture the substances are blended together.
Bonded
A ____ property of water is that it is unreactive with oil.
Chemical
Sodium Chloride is a (NaCl):
Chemical
hydrochloric acid is a:
Chemical
Is rusting iron a Physical or Chemical change?
Chemical Change
Is dissolving salt in water a physical or chemical change?
Chemical change
Is reacting with sodium to produce sodium hydroxide and water a physical or chemical property?
Chemical property
Chemistry the study of _____ and the changes it undergoes
Chemicals
Copper (II) chloride is a:
Compound
Water is a:
Compound
In the gas state, a substance will have a(n) _____ volume.
Indefinite
Phase changes are classified as _____ changes.
Physical
Is mixing sand and water and physical or chemical change?
Physical Change
Is boiling water a physical or chemical change?
Physical change
Is breaking a glass window physical or chemical change?
Physical change
Is mixing salt & pepper physical or chemical change?
Physical change
Is pulverizing a rock a physical or chemical change?
Physical change
Is a sweet smell a physical or chemical property?
Physical property
Is density = 1.0g/mL an physical or chemical property?
Physical property
Is dissolving in water a physical or chemical property?
Physical property
Is freezing at 0 celsius a physical or chemical property?
Physical property
Is not combustible a physical or chemical property?
Physical property
Is not magnetic a physical or chemical property?
Physical property
Is tasteless and physical or chemical property?
Physical property
A 100 mass is weighed three times on a balance and the following results are obtained: 95.0g, 94.9g, 95.1g, Are these measurements accurate? Are they precise? Explain your answer completely.
Precise, Not accurate. They were all very close together
______ Always have uniform and definite compositions
Pure Substances
Density is a _____ property of a substance
physical
Is boiling water a physical or chemical change?
physical change
Is dissolving a physical or chemical change?
physical change
Is melting butter a physical or chemical change?
physical change
(Iron) 30g + _____ = (Iron (II) sulfide) 40g
(sulfur) 10g
(3.1 x 10^8) x (4.792 x 10^5)
1.5 x 10^14
0.000032 x 0.0000007
2 x 10^-11
How many significant figures are in 0.00250?
3 s.f.
How many significant figures are in 0.135?
3 s.f.
How many significant figures are in 128?
3 s.f.
How many significant figures are in 2050?
3 s.f.
How many significant figures are in 70.0?
3 s.f.
15,000,000,000 / 0.4317
3.5 x 10^10
How many significant figures are in 100.5?
4 s.f.
(1.22 x 10^-13) / (3.445 x 10^6)
4.20 x 10^-7
How many significant figures are in 0.0020300?
5 s.f.
00000000002 / 0.00311
6 x 10^2
How many significant figures are in 24.00000?
7 s.f.
79.321 - 5.9218
7.340 x 10^1
Phosphorus is a:
Element
Potassium is a:
Element
A taco is:
Heterogeneous mixture
Trix Cereal is a:
Heterogeneous mixture
Vanilla ice cream is a:
Homogeneous
Cake batter is a:
Homogeneous Mixture
A penny is:
Homogeneous mixture
In the ____ state, substances have a definite volume and an indefinite shape.
Liquid
_____ Is a measure of the amount of matter in an object.
Mass
Anything that has mass or volume is called ____.
Matter
Paper burning is an example of a _____ change
chemical
Is digesting food a chemical or physical change?
chemical change
_____ is an example of a physical change
freezing
Granite is a:
heterogeneous mixture
_____ zeros are never significant
leading
In a chemical equation the reactants are always written on the _____ side of the arrow.
left
