CHEM 210 BIOCHEMISTRY FINAL EXAM 2024
ACTUAL CORRECT QUESTIONS WITH VERIFIED
ANSWERS GUARANTEE PASS
In particular gravimetric analysis, the precipitate
of bariums ulfate was weighed before it was
completely dried. The likely impact of this error
on the calculated result is.
A. Minimal, because the mass of water is very
low.
B. Lower result than correct value.
C. Higher result than correct value.
D. Minimal, because calculation assumes a
hydrated sample is produced.
E. All of the above are not correct. - ....ANSWER
>>>>C. Higher result than correct value.
Atomic spectroscopy is...
,A. Measurement of intensity of emitted light at a
particular wavelength from the atoms that are
excited thermally.
B. Measurement of absorbance of emitted light at
particular wavelength from atoms excited
thermally.
C. Measurement of intensity of emitted light at
particular wavelength from the atoms that are
excited by monochromatic light.
D. Measurement of intensity of absorbed light at a
particular wavelength from the atoms that are
excited thermally.
E. None of the above. - ....ANSWER >>>>A.
Measurement of intensity of emitted light at a
particular wavelength from the atoms that are
excited thermally.
In many countries, fish with more than 0.500 ppm
mercury is considered unsafe. In one experiment,
a 0.750 g piece of tuna was appropriately treated
and made up to 10.0 mL solution. This solution
,returned an absorbance of 0.70. Using the
calibration graph below, what can be concluded
from this analysis?
A. The tuna does not contain mercury.
B. The concentration of mercury in the tuna is
less than 0.500 ppm and it can be eaten safely.
C. The concentration of mercury is exactly equal
to 0.500 ppm and may or may not be safe to eat.
D. The concentration of mercury in the tuna is
greater than 0.500 ppm and it should not be
eaten.
E. None of the above. - ....ANSWER >>>>D. The
concentration of mercury in the tuna is greater
than 0.500 ppm and it should not be eaten.
Of the following compounds, which would you
expect to elute first from a nonpolar gas
chromatographic column?
A. Methanol (CH3OH)
, B. Ethanol (CH3CH2OH)
C. n-Propanol (CH3CH2CH2OH) D. n-Butanol
(CH3CH2CH2CH2OH)
E. n-Pentanol (CH3CH2CH2CH2CH2OH) -
....ANSWER >>>>A. Methanol (CH3OH)
Separation of ions in mass spectrometer take
place on the basis of which of the following?
A) Mass
B) Charge
C) Molecular weight
D) Mass to charge ratio
E) None of the above. - ....ANSWER >>>>D) Mass to
charge ratio
Which of the following are examples of
systematic errors?
I. Weighing a precipitate on an electronic balance.
II. Consistently reading burette volumes from the
top of the meniscus.
III. Using an incorrectly labelled standard solution
in a titration.
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