Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition) - Standalone book
12th Edition
ISBN: 9780321908445
Author: Karen C. Timberlake
Publisher: PEARSON
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Question
Chapter 2.1, Problem 2.2QAP
Interpretation Introduction
Interpretation: We are asked to explain why the given quantities become meaningless without the units.
Concept introduction: In order to have a correct stated quantity, we need the magnitude and units of the amount.
■ Quantities are nothing without units.
■ SI unit system allows to have a reference and correct fixed amounts
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There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS).
Ca, ppm
V, ppm
SCa, arb. units
SV, arb. units
20.0
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14261.02
40.0
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17997.10
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39275.74
12988.01
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57530.75
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A mixture of 0.568 M H₂O, 0.438 M Cl₂O, and 0.710 M HClO are enclosed in a vessel at 25 °C.
H₂O(g) + C₁₂O(g) = 2 HOCl(g)
K = 0.0900 at 25°C
с
Calculate the equilibrium concentrations of each gas at 25 °C.
[H₂O]=
[C₁₂O]=
[HOCI]=
M
Σ
M
Chapter 2 Solutions
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition) - Standalone book
Ch. 2.1 - Prob. 2.1QAPCh. 2.1 - Prob. 2.2QAPCh. 2.1 - Prob. 2.3QAPCh. 2.1 - Prob. 2.4QAPCh. 2.1 - Write the abbreviation for each of the following:...Ch. 2.1 - Write the abbreviation for each of the following:...Ch. 2.2 - Prob. 2.7QAPCh. 2.2 - Prob. 2.8QAPCh. 2.2 - Prob. 2.9QAPCh. 2.2 - Prob. 2.10QAP
Ch. 2.2 - 2.13 Indicate if the zeros are significant in each...Ch. 2.2 - 2.14 Indicate if the zeros are significant in each...Ch. 2.2 - 2.9 How many significant figures are in each of...Ch. 2.2 - How many significant figures are in each of the...Ch. 2.2 - 2.11 In which of the following pairs do both...Ch. 2.2 - 2.12 In which of the following pairs do both...Ch. 2.2 - 2.15 Write each of the following in scientific...Ch. 2.2 - 2.16 Write each of the following in scientific...Ch. 2.3 - Prob. 2.19QAPCh. 2.3 - Prob. 2.20QAPCh. 2.3 - Round off each of the following calculator answers...Ch. 2.3 - Prob. 2.22QAPCh. 2.3 - Prob. 2.23QAPCh. 2.3 - Prob. 2.24QAPCh. 2.3 - Prob. 2.25QAPCh. 2.3 - Prob. 2.26QAPCh. 2.3 - Prob. 2.27QAPCh. 2.3 - Prob. 2.28QAPCh. 2.4 - Prob. 2.29QAPCh. 2.4 - Prob. 2.30QAPCh. 2.4 - 2.31 Write the abbreviation for each of the...Ch. 2.4 - Write the abbreviation for each of the following...Ch. 2.4 - Prob. 2.33QAPCh. 2.4 - Prob. 2.34QAPCh. 2.4 - Write the numerical value for each of the...Ch. 2.4 - Prob. 2.36QAPCh. 2.4 - Prob. 2.37QAPCh. 2.4 - Use a prefix to write the name for each of the...Ch. 2.4 - Complete each of the following metric...Ch. 2.4 - Prob. 2.40QAPCh. 2.4 - Prob. 2.41QAPCh. 2.4 - Prob. 2.42QAPCh. 2.5 - Why can two conversion factors be written for an...Ch. 2.5 - Prob. 2.44QAPCh. 2.5 - Prob. 2.45QAPCh. 2.5 - Prob. 2.46QAPCh. 2.5 - Write the equality and two conversion factors, and...Ch. 2.5 - Write the equality and two conversion factors, and...Ch. 2.6 - Prob. 2.49QAPCh. 2.6 - Prob. 2.50QAPCh. 2.6 - Prob. 2.51QAPCh. 2.6 - Prob. 2.52QAPCh. 2.6 - Prob. 2.53QAPCh. 2.6 - Prob. 2.54QAPCh. 2.6 - Prob. 2.55QAPCh. 2.6 - Prob. 2.56QAPCh. 2.7 - Prob. 2.57QAPCh. 2.7 - Prob. 2.58QAPCh. 2.7 - Prob. 2.59QAPCh. 2.7 - Prob. 2.60QAPCh. 2.7 - Prob. 2.61QAPCh. 2.7 - Prob. 2.62QAPCh. 2 - In which of the fo1losing pairs do both numbers...Ch. 2 - In which of the following pairs do both numbers...Ch. 2 - Indicate if each of the following is answered with...Ch. 2 - Prob. 2.66UTCCh. 2 - Prob. 2.67UTCCh. 2 - Prob. 2.68UTCCh. 2 - Prob. 2.69UTCCh. 2 - Prob. 2.70UTCCh. 2 - Prob. 2.71AQAPCh. 2 - Prob. 2.72AQAPCh. 2 - Prob. 2.73AQAPCh. 2 - Prob. 2.74AQAPCh. 2 - Prob. 2.75AQAPCh. 2 - Prob. 2.76AQAPCh. 2 - Prob. 2.77AQAPCh. 2 - Prob. 2.78AQAPCh. 2 - Prob. 2.79AQAPCh. 2 - Prob. 2.80AQAPCh. 2 - Prob. 2.81AQAPCh. 2 - Prob. 2.82AQAPCh. 2 - Prob. 2.83AQAPCh. 2 - Prob. 2.84AQAPCh. 2 - Prob. 2.85AQAPCh. 2 - Prob. 2.86AQAPCh. 2 - Prob. 2.87AQAPCh. 2 - Prob. 2.88AQAPCh. 2 - Prob. 2.89CQCh. 2 - Prob. 2.90CQCh. 2 -
2.117 A car travels at 55 mi/h and gets 11 km/L...Ch. 2 - Prob. 2.92CQCh. 2 - Prob. 2.93CQCh. 2 - A sunscreen preparation contains 2.50% benzyl...Ch. 2 - Prob. 2.95CQCh. 2 - Prob. 2.96CQCh. 2 - Prob. 2.97CQCh. 2 - Prob. 2.98CQCh. 2 - Prob. 2.99CQCh. 2 - Prob. 2.100CQ
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