Principles of Chemistry The Molecular Science 1st. Edition by John W. Moore, Conrad L. Stanitski, Peter C. Jurs | 9780495390794 | 0495390798 | Holooly

Intro to Chemical Engineering

Principles of Chemistry The Molecular Science

208 SOLVED PROBLEMS

Question: 18.PS.7

Predicting Redox Reactions (a) Will zinc metal react with a 1 M Ag^+(aq) solution? If so, what is E° for the reaction? (b) Will a 1 M Fe^2+(aq) solution react with metallic tin? If so, what is E° for the reaction? ...

Verified Answer:

(a) Yes.

E^\circ_{cell} = + 1.56  V

...

Question: 18.PS.10

Using the Nernst Equation Consider this electrochemical reaction: Zn(s) + Ni^2+(aq) → Zn^2+(aq) + Ni(s) The standard cell potential E°cell = 0.51 V. Find the voltage if the Ni^2+ concentration is 5.0 M and the Zn^2+ concentration is 0.050 M. ...

Verified Answer:

0.57 V Strategy and Explanation We use the Nern...

Question: 18.PS.12

Using the Faraday Constant How many grams of copper will be deposited at the cathode of an electrolysis cell if an electric current of 15 mA is applied for 1.0 h through an aqueous solution containing excess Cu^2+ ions? ...

Verified Answer:

0.018 g Cu Strategy and Explanation We use the s...

Question: 19.PS.1

Radioactive Series An intermediate species in the uranium-238 decay series shown in Figure 19.1 is polonium-218. It emits an alpha particle, followed by emission of a beta particle, followed by the emission of a beta particle. Write the nuclear equations for these three reactions. ...

Verified Answer:

^{218}_{84}Po → ^{4}_{2}He + ^{214}_{82}P...

Question: 19.PS.2

Nuclear Equations Complete these nuclear equations by filling in the missing symbol, mass number, and atomic number of the product species. (a) 9^18F → 9^18O + — (b) 13^26Al + -1^0e → — (c) 79^208Au → 80^208Hg + — (d) 84^218Po → 2^4He + — ...

Verified Answer:

(a)

^{~~0}_{+1}e

(b)...

Question: 19.PS.3

Nuclear Stability For each of these unstable isotopes, write a nuclear equation for its probable mode of decay. (a) Silicon-32, 14^32Si (b) Titanium-43, 22^43Ti (c) Plutonium-239, 94^239Pu (d) Manganese-56, 25^56Mn ...

Verified Answer:

(a)

^{32}_{14}Si → ^{~~0}_{-1}e + ^{32}_{...

Question: 19.PS.4

Half-Life Iodine-131, used to treat hyperthyroidism, has a half-life of 8.04 days. 53^131I → 54^131Xe + -1^0e t1/2 = 8.04 days If you have a sample containing 10.0 µg of iodine-131, what mass of the isotope will remain after 32.2 days? ...

Verified Answer:

0.0625 µg Strategy and Explanation First, we fin...

Question: 19.PS.5

Half-Life A sample of ^24Na initially undergoes 3.50 × 10^4 disintegrations per second (s^-1). After 24.0 h, its disintegration rate has fallen to 1.16 × 10^4 s^-1. What is the half-life of ^24Na? ...

Verified Answer:

15.0 h Strategy and Explanation We use Equation ...

Question: A.1

Find the number whose log is 5.234. ...

Verified Answer:

Recall that

\log  x = n

, where [lat...

Question: A.2

Find the number whose log is -3.456. ...

Verified Answer:

10^{-3.456} = 10^{0.544} × 10^{-4} = 3.50 ×...

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