Chemistry The Molecular Nature of Matter and Change With Advanced 8th. Edition by Silberberg Martin | 9781259741098 | 1259741095 | Holooly

Intro to Chemical Engineering

Chemistry The Molecular Nature of Matter and Change With Advanced

246 SOLVED PROBLEMS

Question: 19.4

Finding the pH During a Weak Acid–Strong Base Titration Problem Calculate the pH during the titration of 40.00 mL of 0.1000 M propanoic acid (HPr; Ka = 1.3×10^−5) after each of the following additions of 0.1000 M NaOH: (a) 0.00 mL (b) 30.00 mL (c) 40.00 mL (d) 50.00 mL ...

Verified Answer:

Plan (a) 0.00 mL: No base has been added yet, so t...

Question: 21.5

Writing Spontaneous Redox Reactions and Ranking Oxidizing and Reducing Agents by Strength Problem (a) Combine pairs of the balanced half-reactions (1), (2), and (3) into three spontaneous reactions A, B, and C, and calculate Ecell° for each. (b) Rank the relative strengths of the oxidizing and ...

Verified Answer:

Plan (a) To write spontaneous redox reactions, we ...

Question: 3.11

Determining a Molecular Formula from Combustion Analysis Problem Vitamin C (ℳ = 176.12 g/mol) is a compound of C, H, and O found in many natural sources, especially citrus fruits. When a 1.000-g sample of vitamin C is burned in a combustion apparatus, the following data are obtained: Mass of CO2 ...

Verified Answer:

Plan We find the masses of

CO_2

and...

Question: 3.6

Calculating the Mass Percent of Each Element in a Compound from the Formula Problem The effectiveness of fertilizers depends on their nitrogen content. Ammonium nitrate is a common fertilizer. What is the mass percent of each element in ammonium nitrate? ...

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Plan We know the relative amounts (mol) of the ele...

Question: 2.16

Calculating the Molecular Mass of a Compound Problem Using the periodic table, calculate the molecular (or formula) mass of (a) Tetraphosphorus trisulfide (b) Ammonium nitrate ...

Verified Answer:

Plan We first write the formula, then multiply the...

Question: 21.6

Calculating K and ΔG° from Ecell° Problem Silver occurs in trace amounts in some ores of lead, and lead can displace silver from solution: Pb(s) + 2Ag^+(aq) ⟶ Pb^2+(aq) + 2Ag(s) As a consequence, silver is a valuable byproduct in the industrial extraction of lead from its ores. Calculate K and ΔG° ...

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Plan We divide the spontaneous redox reaction into...

Question: 24.7

Calculating the Binding Energy per Nucleon Problem Iron-56 is an extremely stable nuclide. Compute the binding energy per nucleon for ^56Fe and compare it with that for ^12C (mass of ^56Fe atom = 55.934939 amu; mass of ^1H atom = 1.007825 amu; mass of neutron = 1.008665 amu). ...

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Plan Iron-56 has 26 protons and 30 neutrons. We ca...

Question: 21.8

Calculating the Potential of a Concentration Cell Problem A voltaic cell consists of two Ag/Ag^+ half-cells. In half-cell A, the electrolyte is 0.010 M AgNO3; in half-cell B, it is 4.0×10^−4 M AgNO3. What is Ecell at 298.15 K? ...

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Plan The standard half-cell reactions are identica...

Question: 24.4

Calculating the Specific Activity and the Decay Constant of a Radioactive Nuclide Problem A sample of 2.6×10^−12 mol of antimony-122 (^122Sb) emits 2.76×10^8 β^− particles per minute. a. Calculate the specific activity of the sample (in Ci/g). b. Find the decay constant for ^122Sb. ...

Verified Answer:

Plan (a) The activity (

𝒜

) is the nu...

Question: 21.2

Describing a Voltaic Cell with a Diagram and Notation Problem Draw a diagram, show balanced half-cell and cell equations, and write the notation for a voltaic cell that consists of one half-cell with a Cr bar in a Cr(NO3)3 solution, another half-cell with an Ag bar in an AgNO3 solution, and a KNO3 ...

Verified Answer:

Plan From the given contents of the half-cells, we...

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