Chemistry: Structure and Properties (2nd Edition)
2nd Edition
ISBN: 9780134293936
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 15SAQ
A 20.0-g sample of an element contains
- O
- Mg
- Fe
- Cr
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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 1 Solutions
Chemistry: Structure and Properties (2nd Edition)
Ch. 1 - Explain this statement in your own words and give...Ch. 1 - Explain the main goal of chemistry.Ch. 1 - What are two different ways to classify matter?Ch. 1 - How do solids, liquids, and gases differ?Ch. 1 - Explain the difference between a pure substance...Ch. 1 - Explain the difference between an element and a...Ch. 1 - Explain the difference between a homogeneous and a...Ch. 1 - Describe the scientific approach to knowledge. How...Ch. 1 - Prob. 9ECh. 1 - What observations did Antoine Lavoisier make? What...
Ch. 1 - What theory did John Dalton formulate?Ch. 1 - What is wrong with the expression, “That is just a...Ch. 1 - Summarize the history of the atomic idea. How was...Ch. 1 - Prob. 14ECh. 1 - State and explain the law of definite proportions.Ch. 1 - State and explain the law of multiple proportions....Ch. 1 - What are the main ideas in Dalton’s atomic theory?...Ch. 1 - How and by whom was the electron discovered? What...Ch. 1 - Explain Millikan’s oil drop experiment and how it...Ch. 1 - Prob. 20ECh. 1 - Describe Rutherford’s gold foil experiment. How...Ch. 1 - Describe Rutherford’s nuclear model of the atom....Ch. 1 - If matter is mostly empty space, as suggested by...Ch. 1 - List the three subatomic particles that compose...Ch. 1 - What defines an element?Ch. 1 - Explain the difference between Z (the atomic...Ch. 1 - Where do elements get their names?Ch. 1 - What are isotopes? What is percent natural...Ch. 1 - Describe the two different notations used to...Ch. 1 - Prob. 30ECh. 1 - Prob. 31ECh. 1 - Explain how a mass spectrometer works. What kind...Ch. 1 - What is a mole? How is the mole concept useful in...Ch. 1 - Prob. 34ECh. 1 - Each shape represents a type of particle (such as...Ch. 1 - Using triangles to represent one type of atom and...Ch. 1 - Classify each substance as a pure substance or a...Ch. 1 - Classify each substance as a pure substance or a...Ch. 1 - Prob. 39ECh. 1 - Complete the table. Substance Pure or mixture Type...Ch. 1 - Determine whether each molecular diagram...Ch. 1 - Determine whether each molecular diagram...Ch. 1 - Classify each statement as an observation, a law,...Ch. 1 - Classify each statement as an observation, a law,...Ch. 1 - A chemist decomposes several samples of carbon...Ch. 1 - When astronomers observe distant galaxies, they...Ch. 1 - Prob. 47ECh. 1 - An automobile gasoline tank holds 21 kg of...Ch. 1 - Two samples of carbon tetrachloride are decomposed...Ch. 1 - Two samples of sodium chloride are decomposed into...Ch. 1 - The mass ratio of sodium to fluorine in sodium...Ch. 1 - Upon decomposition, one sample of magnesium...Ch. 1 - Two different compounds containing osmium and...Ch. 1 - Palladium forms three different compounds with...Ch. 1 - Prob. 55ECh. 1 - Sulfur and fluorine form several different...Ch. 1 - Which statements are consistent with Dalton’s...Ch. 1 - Which statements are inconsistent with Dalton’s...Ch. 1 - Which statements are consistent with Rutherford’s...Ch. 1 - Which statements are inconsistent with...Ch. 1 - A chemist in an imaginary universe, where...Ch. 1 - Imagine a unit of charge called the zorg. A...Ch. 1 - Which statements about subatomic particles are...Ch. 1 - Which statements about subatomic particles are...Ch. 1 - Write isotopic symbols in the form XA (e g., C-13)...Ch. 1 - Write isotopic symbols in the form ZAX for each...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - The amount of carbon-14 in ancient artifacts and...Ch. 1 - Uranium-235 is used in nuclear fission. Determine...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Determine the number of protons and the number of...Ch. 1 - Gallium has two naturally occurring isotopes with...Ch. 1 - Magnesium has three naturally occurring isotopes...Ch. 1 - The atomic mass of fluorine is 18.998 amu, and its...Ch. 1 - The atomic mass of copper is 63.546 amu. Do any...Ch. 1 - An element has two naturally occurring isotopes....Ch. 1 - An element has four naturally occuring isotopes...Ch. 1 - Bromine has two naturally occurring isotopes...Ch. 1 - Silicon has three naturally occurring isotopes...Ch. 1 - Use the mass spectrum of europium shown here to...Ch. 1 - Use the mass spectrum of rubidium shown here to...Ch. 1 - How many sulfur atoms are there in 5.52 mol of...Ch. 1 - How many moles of aluminum do 3.71024 aluminum...Ch. 1 - What is the amount, in moles, of each elemental...Ch. 1 - What is the mass, in grams, of each elemental...Ch. 1 - How many silver atoms are there in 3.78 g of...Ch. 1 - What is the mass of 4.91 x 1021 platinum atoms?Ch. 1 - Calculate the number of atoms in each sample. 5.18...Ch. 1 - Calculate the number of atoms in each sample...Ch. 1 - Calculate the mass in grams, of each sample. 1.1 x...Ch. 1 - Calculate the mass, in kg, of each sample. 7.55 x...Ch. 1 - How many carbon atoms are there in a diamond (pure...Ch. 1 - How many helium atoms are there in a helium blimp...Ch. 1 - Calculate the average mass, in grams, of one...Ch. 1 - Using scanning tunneling microscopy, scientists at...Ch. 1 - A 7.83-g sample of HCN contains 0.290 g of H and...Ch. 1 - The ratio of sulfur to oxygen by mass in SO2 is...Ch. 1 - Use the mass spectrum of lead shown here to...Ch. 1 - Use the mass spectrum of mercury shown here to...Ch. 1 - Nuclei with the same number of neutrons but...Ch. 1 - Fill in the blanks to complete the table. Symbol z...Ch. 1 - A penny has a thickness of approximately 1.0 mm....Ch. 1 - Consider the stack of pennies in Problem 103. How...Ch. 1 - A pure copper sphere has a radius of 0.935 in. How...Ch. 1 - A pure titanium cube has an edge length of 2.78...Ch. 1 - A 67.2-g sample of a gold and palladium alloy...Ch. 1 - Common brass is a copper and zinc alloy containing...Ch. 1 - The U.S. Environmental Protection Agency (EPA)...Ch. 1 - Pure gold is usually too soft for jewelry, so it...Ch. 1 - Silver is composed of two naturally occurring...Ch. 1 - To the right is a representation of 50 atoms of a...Ch. 1 - The ratio of oxygen to nitrogen by mass in NO2 is...Ch. 1 - Naturally occurring cobalt consists of only one...Ch. 1 - A 7.36-g sample of copper is contaminated with an...Ch. 1 - The ratio of the mass of O to the mass of N in...Ch. 1 - Naturally occurring magnesium has an atomic mass...Ch. 1 - In Section 1.10 O, it was stated that 1 mol of...Ch. 1 - Use the concepts in this chapter to obtain an...Ch. 1 - A volatile liquid (one that readily evaporates) is...Ch. 1 - The diagram to the right represents solid carbon...Ch. 1 - Use triangles to represent atoms of element A and...Ch. 1 - Identify each statement as being most like an...Ch. 1 - The mole is defined as the amount of a substance...Ch. 1 - Prob. 125ECh. 1 - Using white and black circles to represent...Ch. 1 - In a naturally occurring sample, 19.8% of boron...Ch. 1 - In complete sentences, describe the similarities...Ch. 1 - Calculate the mass in grams of one mole of each of...Ch. 1 - The U.S. Environmental Protection Agency (U.S....Ch. 1 - This image represents a particulate view of a...Ch. 1 - A chemist mixes sodium with water and witnesses a...Ch. 1 - Two samples of a compound containing elements A...Ch. 1 - A compound containing only carbon and hydrogen has...Ch. 1 - Which concept was demostrated by Rutherford’s gold...Ch. 1 - A student re-creates Millikan’s oil drop...Ch. 1 - Prob. 7SAQCh. 1 - An isotope of an element contains 82 protons and...Ch. 1 - How many electrons are in the Cr3+ ion? 24...Ch. 1 - A naturally occurring sample of an element...Ch. 1 - Copper has an atomic mass of 63.55 amu and two...Ch. 1 - Which sample contains the greatest number of...Ch. 1 - A solid copper cube contains 4.31023 atoms. What...Ch. 1 - Determine the number of atoms in 1.85 mL of...Ch. 1 - A 20.0-g sample of an element contains 4.951023...
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