
PREPARING F/YOUR ACS EXAM IN GEN CHEM
18th Edition
ISBN: 9781732776401
Author: EUBANKS
Publisher: American Chemical Society
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Question
Chapter ST, Problem 13PQ
Interpretation Introduction
Interpretation:
Number of atoms in
Concept Introduction:
Mole is S.I. unit. The number of moles is calculated as ratio of mass of compound to molar mass of compound.
Molar mass is sum of total mass in grams of all atoms that make up mole of particular molecule that is mass of 1 mole of compound. The S.I unit is
The expression to relate number of moles, mass and molar mass of compound is as follows:
When atoms and molecules are too small to count then they are expressed in terms of
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b) Certain cyclic compounds are known to be conformationally similar to carbohydrates, although they are not
themselves carbohydrates. One example is Compound C shown below, which could be imagined as adopting
four possible conformations. In reality, however, only one of these is particularly stable. Circle the conformation
you expect to be the most stable, and provide an explanation to justify your choice. For your explanation to be
both convincing and correct, it must contain not only words, but also "cartoon" orbital drawings contrasting the
four structures.
Compound C
Possible conformations (circle one):
Дет
Lab Data
The distance entered is out of the expected range.
Check your calculations and conversion factors.
Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3?
Did you report your data to the correct number of significant figures?
- X
Experimental Set-up
HCI-NH3
NH3-HCI
Longer Tube
Time elapsed (min)
5 (exact)
5 (exact)
Distance between cotton balls (cm)
24.30
24.40
Distance to cloud (cm)
9.70
14.16
Distance traveled by HCI (cm)
9.70
9.80
Distance traveled by NH3 (cm)
14.60
14.50
Diffusion rate of HCI (cm/hr)
116
118
Diffusion rate of NH3 (cm/hr)
175.2
175.2
How to measure distance and calculate rate
For the titration of a divalent metal ion (M2+) with EDTA, the stoichiometry of the reaction is typically:
1:1 (one mole of EDTA per mole of metal ion)
2:1 (two moles of EDTA per mole of metal ion)
1:2 (one mole of EDTA per two moles of metal ion)
None of the above
Chapter ST Solutions
PREPARING F/YOUR ACS EXAM IN GEN CHEM
Ch. ST - Prob. 1PQCh. ST - Prob. 2PQCh. ST - Prob. 3PQCh. ST - Prob. 4PQCh. ST - Prob. 5PQCh. ST - Prob. 6PQCh. ST - Prob. 7PQCh. ST - Prob. 8PQCh. ST - Prob. 9PQCh. ST - Prob. 10PQ
Ch. ST - Prob. 11PQCh. ST - Prob. 12PQCh. ST - Prob. 13PQCh. ST - Prob. 14PQCh. ST - Prob. 15PQCh. ST - Prob. 16PQCh. ST - Prob. 17PQCh. ST - Prob. 18PQCh. ST - Prob. 19PQCh. ST - Prob. 20PQCh. ST - Prob. 21PQCh. ST - Prob. 22PQCh. ST - Prob. 23PQCh. ST - Prob. 24PQCh. ST - Prob. 25PQCh. ST - Prob. 26PQCh. ST - Prob. 27PQCh. ST - Prob. 28PQCh. ST - Prob. 29PQCh. ST - Prob. 30PQ
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Step by Step Stoichiometry Practice Problems | How to Pass ChemistryMole Conversions Made Easy: How to Convert Between Grams and Moles; Author: Ketzbook;https://www.youtube.com/watch?v=b2raanVWU6c;License: Standard YouTube License, CC-BY