Pushing Electrons
4th Edition
ISBN: 9781133951889
Author: Weeks, Daniel P.
Publisher: Cengage Learning
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Nido-boranes are structures with the molecular formula BnHn+4 that exhibit B-B, B-H-B and B-H bonds. Correct?
8:07 AM Wed Dec 18
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General A G
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10
125 mM that yielded peak heights of Aa =
9 1-(a)A sample solution was examined under XRF to quantify the analyte Ce³+. Find the response factor F, when standardized concentration of analyte [Ce³+]A =
concentration of internal standard S i.e. [In³*]s =
151
mM was spiked with standardized
1600 and As = 3015
respectively?
11
12
(i)Define F,
F =
Aa
As
[A]
[S]
+
X
13
(*Define with variables)
4000
14
15
(ii)Calculate F,
F =
numeral
(You will use the F value in part 1-(b) below)
As
16
(*Calculate with numerals)
17
18
1-(b)To determine the unknown conc of analyte [Ce³+], a volume of 15 mL of internal standard S having a concentration [In³+]s =
0.264
M
19
20
was added to 45 mL of unknown, and the mixture was diluted to 100 mL in a volumetric flask. XRF analysis yielded a spectrum, Figure-1, where peak
heights A and As are…
All structural types of Boron hydrides exhibit B-B, B-H-B and B-H bonds. Correct?
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