The low-resolution mass spectrum of an unknown analgesic X had a molecular ion of 151. Possible molecular formulas include C 7 H 5 NO 3 , C 8 H 9 NO 2 and C 10 H 17 N . High-resolution mass spectrometry gave an exact mass of 151.0640. What is the molecular formula of X ?
The low-resolution mass spectrum of an unknown analgesic X had a molecular ion of 151. Possible molecular formulas include C 7 H 5 NO 3 , C 8 H 9 NO 2 and C 10 H 17 N . High-resolution mass spectrometry gave an exact mass of 151.0640. What is the molecular formula of X ?
The low-resolution mass spectrum of an unknown analgesic X had a molecular ion of 151. Possible molecular formulas include
C
7
H
5
NO
3
,
C
8
H
9
NO
2
and
C
10
H
17
N
. High-resolution mass spectrometry gave an exact mass of 151.0640. What is the molecular formula of
X
?
After creating her standard curve for absorption versus the concentration (M) of FD&C Red 40, a student found that her best fit linear line for FD&C Red 40 was y = 2,681x + -0.002.
Her Kool-Aid sample had an absorbance of 0.337. If 0.55 grams of Kool-Aid powder was used to prepare an 8-fl oz cup of her assigned flavor, what is the percent by mass of FD&C Red 40 in her 8-fl oz cup?
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The ppm concentration of Pb2+ in a blood sample were measured with Spectrophotometry. 5.00 mL of a blood sample were taken and this sample gave a signal of 0.301 a.u.. Another 5.00 mL of a blood sample were mixed with 0.50 mL og 1.75 ppm Pb2+. Then, this mixture was diluted to 25.00 mL and this diluted mixture gave a signal of 0.406 a.u.. What is the ppm concentration of a blood sample?
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