Chemistry Atoms First2e
2nd Edition
ISBN: 9781947172647
Author: OpenStax
Publisher: OpenStax College
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Textbook Question
Chapter 10, Problem 37E
Why does spilled gasoline evaporate more rapidly on a hot day than on a cold day?
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Calculating the pH at equivalence of a titration
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Your answer is incorrect.
0/5
a
A chemist titrates 70.0 mL of a 0.7089 M hydrocyanic acid (HCN) solution with 0.4574M KOH solution at 25 °C. Calculate the pH at equivalence. The pK of
hydrocyanic acid is 9.21.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of KOH solution added.
pH
=
11.43]
G
00.
18
Ar
B•
Biological Macromolecules
Naming and drawing the products of aldose oxidation and reduction
aw a Fischer projection of the molecule that would produce L-ribonic acid if it were subjected to mildly oxidizing reaction conditions.
Click and drag to start drawing a
structure.
X
AP
‡
1/5
Naor
Explanation
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● Biological Macromolecules
Identifying the parts of a disaccharide
Take a look at this molecule, and then answer the questions in the table below it.
CH2OH
O
H
H
H
OH
OH
OH
H
H
CH2OH
H
O
OH
H
OH H
H
H
H
OH
Is this a reducing sugar?
Does this molecule contain a glycosidic bond?
If you said this molecule does contain a glycosidic bond, write the symbol
describing it.
If you said this molecule does contain a glycosidic bond, write the common
names (including anomer and enantiomer labels) of the molecules that
would be released if that bond were hydrolyzed.
If there's more than one molecule, separate each name with a comma.
Explanation
Check
O yes
X
O no
○ yes
O no
U
Chapter 10 Solutions
Chemistry Atoms First2e
Ch. 10 - In terms of their bulk properties, how do liquids...Ch. 10 - In terms of the kinetic molecular theory, in what...Ch. 10 - In terms of the kinetic molecular theory, in what...Ch. 10 - Explain why liquids assume the shape of any...Ch. 10 - What is the evidence that all neutral atoms and...Ch. 10 - Open the PhET States of Matter Simulation...Ch. 10 - Define the following and give an example of each:...Ch. 10 - The types of intermolecular forces in a substance...Ch. 10 - Why do the boiling points of the noble gases...Ch. 10 - Neon and HF have approximately the same molecular...
Ch. 10 - Arrange each of the following sets of compounds in...Ch. 10 - The molecular mass of butanol, C4H9OH, is 74.14;...Ch. 10 - On the basis of intermolecular attractions,...Ch. 10 - On the basis of dipole moments and/or hydrogen...Ch. 10 - The melting point of H2O(s) is O C. Would you...Ch. 10 - Silane SiH4, phosphine (PH3), and hydrogen sulfide...Ch. 10 - Explain why a hydrogen bond between two water...Ch. 10 - Under certain conditions, molecules of acetic...Ch. 10 - Proteins are chains of amino acids that can form...Ch. 10 - The density of liquid NH3 is 0.64 g/mL; the...Ch. 10 - Identify the intermolecular forces present in the...Ch. 10 - The test tubes shown here contain equal amounts of...Ch. 10 - Although steel is denser than water, a steel...Ch. 10 - The surface tension and viscosity values for...Ch. 10 - You may have heard someone use the figure of...Ch. 10 - It is often recommended that you let your car...Ch. 10 - The surface tension and viscosity of water at...Ch. 10 - At 25 C, how high will water rise in a glass...Ch. 10 - Water rises in a glass capillary tube to a height...Ch. 10 - Heat is added to boiling water. Explain why the...Ch. 10 - Heat is added to ice at 0 C. Explain why the...Ch. 10 - What feature characterizes the dynamic equilibrium...Ch. 10 - Identify two common observations indicating some...Ch. 10 - Identify two common observations indicating some...Ch. 10 - What is the relationship between the...Ch. 10 - What is the relationship between the...Ch. 10 - Why does spilled gasoline evaporate more rapidly...Ch. 10 - Carbon tetrachloride, CCl4, was once used as a dry...Ch. 10 - When is the boiling point of a liquid equal to its...Ch. 10 - How does the boiling of a liquid differ from its...Ch. 10 - Use the information in Figure 10.24 to estimate...Ch. 10 - A syringe at a temperature of 20 C is filled with...Ch. 10 - Explain the following observations: (a) It takes...Ch. 10 - The enthalpy of vaporization of water is larger...Ch. 10 - Explain why the molar enthalpies of vaporization...Ch. 10 - Explain why the enthalpies of vaporization of the...Ch. 10 - The enthalpy of vaporization of CO2(l) is 9.8...Ch. 10 - The hydrogen fluoride molecule, HF, is more polar...Ch. 10 - Ethyl chloride (boiling point, 13 C) is used as a...Ch. 10 - Which contains the compounds listed correctly in...Ch. 10 - How much heat is required to convert 422 g of...Ch. 10 - Evaporation of sweat requires energy and thus take...Ch. 10 - Titanium tetrachloride, TiCl4, has a melting point...Ch. 10 - From the phase diagram for water (Figure 10.31),...Ch. 10 - What phase changes will take place when water is...Ch. 10 - Pressure cookers allow food to cook faster because...Ch. 10 - From the phase diagram for carbon dioxide in...Ch. 10 - Determine the phase changes that carbon dioxide...Ch. 10 - Consider a cylinder containing a mixture of liquid...Ch. 10 - Dry ice, CO2(s) , does not melt at atmospheric...Ch. 10 - If a severe storm results in the loss of...Ch. 10 - Is it possible to liquefy nitrogen at room...Ch. 10 - Elemental carbon has one gas phase, one liquid...Ch. 10 - What types of liquids typically form amorphous...Ch. 10 - At very low temperatures oxygen, O2, freezes and...Ch. 10 - As it cools, olive oil slowly solidifies and forms...Ch. 10 - Explain why ice, which is a crystalline solid, has...Ch. 10 - Identify the type of crystalline solid (metallic,...Ch. 10 - Identify the type of crystalline solid (metallic,...Ch. 10 - Classify each substance in the table as either a...Ch. 10 - Classify each substance in the table as either a...Ch. 10 - Identify the following substances as ionic,...Ch. 10 - Substance A is shiny, conducts electricity well,...Ch. 10 - Substance B is hard, does not conduct electricity,...Ch. 10 - Describe the crystal structure of iron, which...Ch. 10 - Describe the crystal structure of Pt, which...Ch. 10 - What is the coordination number of a chromium atom...Ch. 10 - What is the coordination number of an aluminum...Ch. 10 - Cobalt metal crystallizes in a hexagonal closest...Ch. 10 - Nickel metal crystallizes in a cubic closest...Ch. 10 - Tungsten crystallizes in a body-centered cubic...Ch. 10 - Platinum (atomic radius =1.38) crystallizes in a...Ch. 10 - Barium crystallizes in a body-centered cubic unit...Ch. 10 - Aluminum (atomic radius = 1.43 ) crystallizes in a...Ch. 10 - The density of aluminum is 2.7 g/cm3; that of...Ch. 10 - The free space in a metal may be found by...Ch. 10 - Cadmium sulfide, sometimes used as a yellow...Ch. 10 - A compound of cadmium, tin, and phosphorus is used...Ch. 10 - What is the formula of the magnetic oxide of...Ch. 10 - A compound containing zinc, aluminum, and sulfur...Ch. 10 - A compound of thallium and iodine crystallizes in...Ch. 10 - Which of the following elements reacts with sulfur...Ch. 10 - What is the percent by mass of titanium in rutile,...Ch. 10 - Explain why the chemically similar alkali metal...Ch. 10 - As minerals were formed from the molten magma,...Ch. 10 - Rubidium iodide crystallizes with a cubic unit...Ch. 10 - One of the various manganese oxides crystallizes...Ch. 10 - NaH crystallizes with the same ciystal structure...Ch. 10 - Thallium(I) iodide crystallizes with the same...Ch. 10 - A cubic unit cell contains manganese ions at the...Ch. 10 - What is the spacing between crystal planes that...Ch. 10 - A diffracrometer using X-rays with a wavelength of...Ch. 10 - A metal with spacing between planes equal to...Ch. 10 - Gold crystallizes in a face-centered cubic unit...Ch. 10 - When an electron in an excited molybdenum atom...
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- Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure Yes. Is the proposed Lewis structure reasonable? Cl- : 2: :Z: :Z: N—N : 0: C C1: O CO No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* ☐ Yes. No, it has the wrong number of valence electrons. The correct number is: ☐ No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | Yes. No, it has the wrong number of valence electrons. The correct number is: No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* | If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0". ☑arrow_forwardUse the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions ΔΗ is (pick one) A This reaction is faster above 103. °C than below. AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous only above -9. °C. AS is (pick one) ΔΗ is (pick one) C The reverse of this reaction is always spontaneous. AS is (pick one) 18 Ararrow_forwardUse the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A The reverse of this reaction is always spontaneous but proceeds slower at temperatures below 41. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 94. °C. AS is (pick one) This reaction is always spontaneous, but ΔΗ is (pick one) C proceeds slower at temperatures below −14. °C. AS is (pick one) Х 00. 18 Ar 무ㅎ B 1 1arrow_forward
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