Chemistry In Focus
7th Edition
ISBN: 9781337670425
Author: Tro
Publisher: Cengage
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Chapter 3, Problem 62E
Interpretation Introduction
Interpretation:
Things that are not composed of atoms are to be named.
Concept Introduction:
An atom is the smallest particle capable of independent existence. All atoms are composed of the same subatomic particles, which are, electrons, protons, and neutrons. These subatomic particles are now known to be composed of quarks.
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(a) The following synthesis of the molecule shown in the circle has a major problem. What is this problem? (2
pts)
1) HBr
(no peroxides)
2) H-
NaNH2
Br
3) NaNH,
4) CH3Br
5) H2, Pd
(b) Starting with the molecule shown below and any other materials with two carbons or less, write out an
alternate synthesis of the circled molecule. More than one step is needed. Indicate the reagent(s) and the major
product in all the steps in your synthesis. (5 pts)
2024 Fall Term (1) Organic Chemistry 1 (Lec)
CHEM 22204 02[6386] (Hunter College)
(c) Using the same starting material as in part (b) and any other materials win two carpons or less, write out
syntheses of the circled molecules shown below. More than one step is needed in each case. Indicate the
reagent(s) and the major product in all the steps in your synthesis. You may use reactions and products from
your synthesis in part (b). (5 pts)
alt
ons for
Free Response Questions
FRQ 1:
0/5
To spectrophotometrically determine the mass percent of cobalt in an ore containing cobalt and
some inert materials, solutions with known [Co?) are prepared and absorbance of each of the
solutions is measured at the wavelength of optimum absorbance. The data are used to create a
calibration plot, shown below.
0.90-
0.80-
0.70
0.60
0.50
0.40-
0.30
0.20-
0.10-
0.00-
0.005
0.010
Concentration (M)
0.015
A 0.630 g sample of the ore is completely dissolved in concentrated HNO3(aq). The mixture is diluted
with water to a final volume of 50.00 ml. Assume that all the cobalt in the ore sample is converted to
Co2+(aq).
a. What is the [Co2] in the solution if the absorbance of a sample of the solution is 0.74?
13
✗
b. Calculate the number of moles of Co2+(aq) in the 50.00 mL solution.
0.008 mols Co
Please correct answer and don't used hand raiting
Chapter 3 Solutions
Chemistry In Focus
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Ch. 3 - Prob. 5SCCh. 3 - Which pair of elements do you expect to be most...Ch. 3 - Which statement is true of the quantum mechanical...Ch. 3 - Why is it important to understand atoms?Ch. 3 - Prob. 2ECh. 3 - What defines an element? How many naturally...Ch. 3 - Prob. 4ECh. 3 - Prob. 5ECh. 3 - Prob. 6ECh. 3 - Prob. 7ECh. 3 - Prob. 8ECh. 3 - Prob. 9ECh. 3 - Prob. 10ECh. 3 - Explain the quantum mechanical model for the atom....Ch. 3 - Give two examples of each: a. alkali metal b....Ch. 3 - Which elements exist as diatomic molecules?Ch. 3 - Explain the difference and similarity between...Ch. 3 - Prob. 15ECh. 3 - Determine the charge of each of the following: a...Ch. 3 - Determine the number of protons and electrons in...Ch. 3 - Determine the number of protons and electrons in...Ch. 3 - Give the atomic number (Z) and the mass number (A)...Ch. 3 - Prob. 20ECh. 3 - The following isotopes have applications in...Ch. 3 - The following isotopes are important in nuclear...Ch. 3 - 14C is used in carbon dating of artifacts....Ch. 3 - 40K is used to measure the age of Earth. Determine...Ch. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Give electron configurations according to the Bohr...Ch. 3 - Give electron configurations according to the Bohr...Ch. 3 - Prob. 29ECh. 3 - How many valence electrons are in each element of...Ch. 3 - Prob. 31ECh. 3 - Draw electron configurations for each of the...Ch. 3 - Which two of the following elements would you...Ch. 3 - Group the following elements into three similar...Ch. 3 - We have seen that the reactivity of an element is...Ch. 3 - What is the electron configuration of Mg2+? How...Ch. 3 - Classify each of the following elements as a...Ch. 3 - Classify each of the following as a metal, a...Ch. 3 - Calculate the atomic mass of neon (Ne), which is...Ch. 3 - An element has two naturally occurring isotopes....Ch. 3 - A fictitious element has two naturally occurring...Ch. 3 - Copper has two naturally occurring isotopes. Cu-63...Ch. 3 - How many moles of titanium are present in 124 g of...Ch. 3 - Prob. 44ECh. 3 - How many moles are there in each sample? a. 45 mg...Ch. 3 - How many moles are there in each sample? a. 55.0 g...Ch. 3 - What is the mass of each sample? a.1.8 mol S...Ch. 3 - What is the mass of each sample? a.2.75 mol Fe...Ch. 3 - Determine the number of atoms in each sample....Ch. 3 - Determine the number of atoms in each sample....Ch. 3 - How many Ag atoms are present in a piece of pure...Ch. 3 - How many platinum atoms are in a pure platinum...Ch. 3 - A pure gold necklace has a volume of 1.8cm3. How...Ch. 3 - A titanium bicycle component has a volume of...Ch. 3 - An iron sphere has a radius of 3.4 cm. How many...Ch. 3 - Calculate the number of atoms in the universe. The...Ch. 3 - The introduction to this chapter states that...Ch. 3 - Suppose the absolute value of the charge of the...Ch. 3 - When we refer to doughnuts or cookies, we often...Ch. 3 - Prob. 60ECh. 3 - Why does Avogadros number have such an odd value?...Ch. 3 - Prob. 62ECh. 3 - Prob. 63ECh. 3 - Prob. 64ECh. 3 - Here are three fictitious elements and a molecular...Ch. 3 - Prob. 66ECh. 3 - Gather any two of the following items, measure...
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