Chemistry Study Guide Review 2015
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ChemistryStudy Guide Review
2015
Two Cubes of Aluminum
Property Same or Different
MaterialMassVolumeDensity
SameDifferentDifferentSame
Cube A is copper and Cube B is pine
Property Same or Different
MaterialMassVolumeDensity
Different
SameDifferent
Different
Cube A is copper and Cube B is pine
Property Same or Different
MaterialMassVolumeDensity
DifferentDifferent
DifferentDifferent
Which is a pure substance and which is a mixture?
air: helium: oxygen: CO2: water: chocolate milk: sugar dissolved in water:
mixturePure substance- elementPure substance- element
Pure substance- compoundPure substance- compound
MixtureMixture
Identify which tool is used to measure each
property: mass:
length:
volume (liquid or irregular solid):
Triple beam balance
Ruler
Graduated Cylinder
Draw a ball-and-stick model for each of the following
compounds:
H2O NH4FeO2
Identify the units of the measuring tool.
Tool UnitsTriple Beam Balance
RulerGraduated Cylinder
gcm
mL OR cm3
Given the chemical formula for sodium acetate (NaC2H3O2),
answer the following questions:
a. How many molecules are present?b. What do the symbols represent? c. Identify the name for each symbol below.
Na: _____________________C: _____________________H: _____________________O: ______________________
1elements
sodiumcarbonhydrogenoxygen
d. How many atoms of each element are there?
e. If the formula was 3NaC2H3O2, which of the above answers would change? Explain.
Given the chemical formula for sodium acetate (NaC2H3O2),
answer the following questions:
Sodium: CarbonHydrogen:Oxygen:
12
32
The # of Molecules AND the # of atoms of each element would be multiplied by 3
Identify each as a chemical or physical
change. rust forming on a
railing: sugar dissolving in
water: water evaporating: wood burning:
Chemical ChangeChemical Change
Physical ChangeChemical Change
Two different objects are investigated by a group of
students. They measured the mass and volume of each bar and recorded the results in the table
below. Object Mass Volume
A 120 g 100 cm3
B 85 g 100 cm3
Calculate the density of each bar of soap.
A: 1.2 g/cm3
B: 0.85 g/cm3
Draw and label the positions of the objects in a container of water.
Explain why you drew each object in the position selected.
A: 1.2 g/cm3
B: 0.85 g/cm3
Soap A is MORE dense than water so it FLOATS and Soap B is LESS dense than water so it SINKS.
B
A
You want to determine the density of a rectangular eraser.
a. What two properties are used to determine density?
b. Describe how you measure the properties identified in a. Identify any tools that would be used.
c. Explain how the measurements you described in part b can be used to determine the density of the eraser.
Mass & Volume
Mass- TBB & Volume- ruler
Mass/Volume = Density
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