UNIT 1
END OF COURSE EXAM (EOC)
Review
1.
When multiplying or dividing with sig figs, the answer must be
rounded to the same # of sig figs as the part of the problem
with the ____________ sig figs.
2. A graduated cylinder is the instrument best used when
measuring __________ _______.
3. In order, what are the steps of the scientific method?
4. Convert 6.2 x 10-4 to standard notation.
5. Convert 56789 to scientific notation.
6. 7007 has how many sig figs? And what rule(s) apply?
7. 0.0007 has how many sig figs? And what rule(s) apply?
8. 700 000 000 has how many sig figs ? And what rule(s) apply?
9. Lab safety includes wearing what items?
Acid Safety requires... N__________ the acid before
disposal; add ______ to ________, not the other way around.
10. What are the 6 branches of Chemistry and what do they
study?
Can you name the following?
KClO3
NH4NO3
NH4Cl
Zn
CuSO4
NaOH
• When multiplying or dividing with sig figs,
the answer must be rounded to the same
# of sig figs as the part of the problem with
the ______________sig figs.
• least number of
• A graduated cylinder is the instrument best
used when measuring ______ ________.
• liquid volume
Steps of the Scientific Method
Purpose
Background
Hypothesis
Results
Analyze
Conclusion
Convert 6.2 x 10-4 to standard notation.
• We must move the decimal 4 places to the
left since it is a negative exponent.
• So… we add 3 zeros to the left and place
the decimal.
0.00062
Convert 56789 to scientific notation.
We must move the decimal 4 places to the
left and place the decimal after the 5, so
the number becomes…
5.6789 x 104
7007 has how many sig figs ?
• Each digit here is significant.
• So…there are 4 sig figs.
• Sandwiched Zeros Rule 2
0.0007 has how many sig figs ?
• The zeros just hold places in this case.
• There is only 1 sig fig here.
• Leading Zeros Rule 3
• If the number had zeroes after the 7, they
would each be significant.
700 000 000 has how many sig figs ?
• Again, the zeros only hold places.
• There is no decimal to say that they are
significant, so zeros are not.
• Zeros with understood decimal Rule 5
• This number has only 1 sig fig. However, if an
answer required 9 sig figs and this number was
in scientific notation, 7. 00 000 000 x 108 all
zeros are significant
• Lab safety for acids includes: wear
G_______, A_______ and C______
T_____ S_______
• N__________ the acid before disposal;
add _______ to ________, not the other
way around.
• Goggles and Aprons
• Neutralize
• Acid to water
What are the 6 branches of
Chemistry and what do they study?
• Organic chemistry
– study of the
element carbon and
• Analytical chemistrycompounds that
identification of chemicals
contain carbon
• Physical chemistry –
the study of properties
of matter and energy
• Biochemistry – study
of composition and
changes in living species
• Theoretical chemistry
– computer modeling
• Inorganic chemistry
– the study of
substances not
containing carbon
Can you name the following?
KClO3 Potassium chlorate
NH4NO3 Ammonium nitrate
NH4Cl Ammonium chloride
Zn
Zinc
CuSO4 Copper Sulfate
NaOH Sodium Hydroxide