Chemistry: Structure and Properties (2nd Edition)
2nd Edition
ISBN: 9780134293936
Author: Nivaldo J. Tro
Publisher: PEARSON
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Textbook Question
Chapter 7, Problem 3E
What is the difference between a physical change and a chemical change? List some examples of each.
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3.
2.
1.
On the graph below, plot the volume of rain in milliliters versus its height in centimeters for the 400 mL beaker. Draw a
straight line through the points and label it "400 mL beaker."
Volume (mL)
400
350
300
250
200
150
750 mL
Florence
Volume Versus Height of Water
400 mL
beaker
100
50
0
0
2 3
4
5
Height (cm)
6 7 8 9 10
Explain why the data points for the beaker lie roughly on a straight line. What kind of relationship is this? How do you know?
(see page 276 text) the design of the beaker is a uniform cylinder
the volume of liquid increases evenly with its height
resulting in a linear relationship.
What volume would you predict for 10.0 cm of water? Explain how you arrived at your answer. Use the data table and the
graph to assist you in answering the question.
4. Plot the volume of rain in milliliters versus its height in centimeters for the 250 mL Florence flask on the same graph. Draw a
best-fit curve through the points and label it "250 mL Florence flask."
oke came
Show work. Don't give Ai generated solution
In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
Chapter 7 Solutions
Chemistry: Structure and Properties (2nd Edition)
Ch. 7 - Prob. 1ECh. 7 - Prob. 2ECh. 7 - What is the difference between a physical change...Ch. 7 - What is the difference between a physical property...Ch. 7 - What is a balanced chemical equation?Ch. 7 - Why must chemical equations be balanced?Ch. 7 - What is reaction stoichiometry? What is the...Ch. 7 - In a chemical reaction, what is the limiting...Ch. 7 - In a chemical reaction, what is the theoretical...Ch. 7 - We typically calculate the percent yield using the...
Ch. 7 - Prob. 11ECh. 7 - Prob. 12ECh. 7 - Write a general equation for the reaction of an...Ch. 7 - Prob. 14ECh. 7 - Classify each change as physical or chemical....Ch. 7 - Prob. 16ECh. 7 - Prob. 17ECh. 7 - Prob. 18ECh. 7 - Classify each of the listed properties of...Ch. 7 - Prob. 20ECh. 7 - Classify each property as physical or chemical the...Ch. 7 - Prob. 22ECh. 7 - Sulfuric acid (H2SO4) is a component of acid rain...Ch. 7 - Nitric acid (HNO3) is a component of acid rain...Ch. 7 - Prob. 25ECh. 7 - Prob. 26ECh. 7 - Write a balanced chemical equation for the...Ch. 7 - Write a balanced equation for the photosynthesis...Ch. 7 - Write a balanced chemical equation for each...Ch. 7 - Write a balanced chemical equation for each...Ch. 7 - Write a balanced chemical equation for the...Ch. 7 - Write a balanced chemical equation for the...Ch. 7 - Balance each chemical equation. CO2(g) + CaSiO3(s)...Ch. 7 - Balance each chemical equation. Na2S(aq) +...Ch. 7 - Prob. 35ECh. 7 - Consider the unbalanced equation for the...Ch. 7 - Calculate how many moles of NO2 form when each...Ch. 7 - Calculate how many moles of NH3 form when each...Ch. 7 - Consider the balanced equation: SiO2(s) + 3 C(s)...Ch. 7 - Consider the balanced equation: 2 N2H4(s) +...Ch. 7 - Hydrobromic acid (HBr) dissolves solid iron...Ch. 7 - Sulfuric acid (H2SO4) dissolves aluminum metal...Ch. 7 - For each of the reactions, calculate the mass (in...Ch. 7 - For each of the reactions, calculate the mass (in...Ch. 7 - For the following reaction, determine the limiting...Ch. 7 - Find the limiting reactant for each initial amount...Ch. 7 - Consider the reaction: HCl(g) + O2(g) 2 H2O(g) +...Ch. 7 - Consider the reaction: 2 CH 3 OH(g)+3 O 2 (g)2 CO...Ch. 7 - Calculate the theoretical yield of the product (in...Ch. 7 - Calculate the theoretical yield of product (in...Ch. 7 - Zinc sulfide reacts with oxygen according to the...Ch. 7 - Iron(ll) sulfide reacts with hydrochloric acid...Ch. 7 - For the reaction shown, calculate the theoretical...Ch. 7 - For the reaction shown, calculate the theoretical...Ch. 7 - Iron(lll) oxide reacts with carbon monoxide...Ch. 7 - Elemental phosphorus reacts with chlorine gas...Ch. 7 - Lead(ll) ions can be removed from solution with...Ch. 7 - Prob. 58ECh. 7 - Urea (CH4N2O) is a common fertilizer that is...Ch. 7 - Prob. 60ECh. 7 - Prob. 61ECh. 7 - Complete and balance each combustion reaction...Ch. 7 - Prob. 63ECh. 7 - Prob. 64ECh. 7 - Prob. 65ECh. 7 - Prob. 66ECh. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Prob. 70ECh. 7 - Aspirin can be made in the laboratory by reacting...Ch. 7 - The combustion of liquid ethanol (C2H5OH) produces...Ch. 7 - Prob. 73ECh. 7 - Prob. 74ECh. 7 - Prob. 75ECh. 7 - An important reaction that takes place in a blast...Ch. 7 - A liquid fuel mixture contains 30.35% hexane...Ch. 7 - Titanium occurs in the magnetic mineral ilmenite...Ch. 7 - A mixture of C3H8 and C2H2 has a mass of 2.0 g. It...Ch. 7 - Prob. 80ECh. 7 - Lead poisoning is a serious condition resulting...Ch. 7 - Prob. 82ECh. 7 - Metallic aluminum reacts with MnO2 at elevated...Ch. 7 - Prob. 84ECh. 7 - Consider the reaction: 4K(s)+O2(g)2K2O(s) The...Ch. 7 - Prob. 86ECh. 7 - Consider the reaction:...Ch. 7 - Prob. 88ECh. 7 - Prob. 89ECh. 7 - Prob. 90ECh. 7 - What are the correct coefficients (reading from...Ch. 7 - Prob. 2SAQCh. 7 - Prob. 3SAQCh. 7 - For the reaction shown here, 3.5 mol A is mixed...Ch. 7 - Manganese(IV) oxide reacts with aluminum to form...Ch. 7 - Sodium and chlorine react to form sodium chloride....Ch. 7 - Sulfur and fluorine react to form sulfur...Ch. 7 - A reaction has a theoretical yield of 45.8 g. When...Ch. 7 - Prob. 9SAQCh. 7 - Solid potassium chlorate (KCIO3) decomposes into...
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- 5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo- hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number of significant figures. B. Freezing Point of Cyclohexane plus Calculation Zone Unknown Solute 2. Mass of cyclohexane (g) 10.14 Part C.4 3. Mass of added solute (g) 0.255 C. Calculations 1. k; for cyclohexane (°C⚫ kg/mol) 20.0 2. Freezing point change, AT, (°C) 3.04 Part C.6 3. Mass of cyclohexane in solution (kg) 4. Moles of solute, total (mol) Show calculation. 5. Mass of solute in solution, total (g) 6. Molar mass of solute (g/mol) Show calculation.arrow_forwardDraw and name the R groups of all 20 amino acids.arrow_forward3. Two solutions are prepared using the same solute: Solution A: 0.14 g of the solute dissolves in 15.4 g of t-butanol Solution B: 0.17 g of the solute dissolves in 12.7 g of cyclohexane Which solution has the greatest freezing point change? Show calculations and explain.arrow_forward
- 2. Give the ground state electron configuration (e.g., 02s² σ*2s² П 2p²) for these molecules and deduce its bond order. Ground State Configuration Bond Order H2+ 02- N2arrow_forward1. This experiment is more about understanding the colligative properties of a solution rather than the determination of the molar mass of a solid. a. Define colligative properties. b. Which of the following solutes has the greatest effect on the colligative properties for a given mass of pure water? Explain. (i) 0.01 mol of CaCl2 (ii) 0.01 mol of KNO3 (iii) 0.01 mol of CO(NH2)2 (an electrolyte) (an electrolyte) (a nonelectrolyte)arrow_forward5. b. For Trials 2 and 3, the molar mass of the solute was 151 g/mol and 143 g/mol respectively. a. What is the average molar mass of the solute ? b. What are the standard deviation and the relative standard deviation (%RSD) for the molar mass of the solute ?arrow_forward
- Show work. Don't give Ai generated solutionarrow_forward2. Explain why ice cubes formed from water of a glacier freeze at a higher temperature than ice cubes formed from water of an under- ground aquifer. Photodynamic/iStockphotoarrow_forwardShow reaction mechanism. don't give Ai generated solutionarrow_forward
- 7. Draw the Lewis structures and molecular orbital diagrams for CO and NO. What are their bond orders? Are the molecular orbital diagrams similar to their Lewis structures? Explain. CO Lewis Structure NO Lewis Structure CO Bond Order NO Bond Order NO Molecular Orbital Diagram CO Molecular Orbital Diagramarrow_forward5. The existence of compounds of the noble gases was once a great surprise and stimulated a great deal of theoretical work. Label the molecular orbital diagram for XeF (include atom chemical symbol, atomic orbitals, and molecular orbitals) and deduce its ground state electron configuration. Is XeF likely to have a shorter bond length than XeF+? Bond Order XeF XeF+arrow_forward6. Draw the molecular orbital diagram shown to determine which of the following is paramagnetic. B22+ B22+, B2, C22, B22 and N22+ Molecular Orbital Diagram B2 C22- B22- N22+ Which molecule is paramagnetic?arrow_forward
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