Chemistry 4th. Edition by Raymond Chang, Jason Overby | 9781264364329 | 1264364326 | Holooly

General Chemistry

Chemistry

223 SOLVED PROBLEMS

Question: 16.9

Using the data in Table 16.2, calculate the solubility of copper(II) hydroxide, Cu(OH)2, in g/L. ...

Verified Answer:

Consider the dissociation of

Cu(OH)_{2}[/la...

Question: 12.5

Calculate the molality of a 35.4 percent (by mass) aqueous solution of phosphoric acid (H3PO4). The molar mass of phosphoric acid is 97.99 g. Strategy In solving this type of problem, it is convenient to assume that we start with 100.0 g of the solution. If the mass of phosphoric acid is 35.4 ...

Verified Answer:

From the known molar mass of phosphoric acid, we c...

Question: 6.8

A quantity of 1.00 × 10² mL of 0.500 M HCl was mixed with 1.00 × 10² mL of 0.500 M NaOH in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of the HCl and NaOH solutions was the same, 22.50°C, and the final temperature of the mixed solution was 25.86°C. Calculate ...

Verified Answer:

Assuming no heat is lost to the surroundings, [lat...

Question: 5.7

A small bubble rises from the bottom of a lake, where the temperature and pressure are 8°C and 6.4 atm, to the water’s surface, where the temperature is 25°C and the pressure is 1.0 atm. Calculate the final volume (in mL) of the bubble if its initial volume was 2.1 mL. Strategy In solving this ...

Verified Answer:

According to Equation (5.9)

\frac{P_{1}V_{1...

Question: 19.1

Balance the following nuclear equations (that is, identify the product X): (a) 84 ^212Po ⟶ 82 ^208Pb + X (b) 55 ^137Cs ⟶ 56 ^137Ba + X Strategy In balancing nuclear equations, note that the sum of atomic numbers and that of mass numbers must match on both sides of the equation. ...

Verified Answer:

(a) The mass number and atomic number are 212 and ...

Question: 19.2

The atomic mass of ^127 53I is 126.9004 amu. Calculate the nuclear binding energy of this nucleus and the corresponding nuclear binding energy per nucleon. Strategy To calculate the nuclear binding energy, we first determine the difference between the mass of the nucleus and the mass of all the ...

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There are 53 protons and 74 neutrons in the iodine...

Question: 19.3

Write the balanced equation for the nuclear reaction 26 ^56F(d, α) 25 ^54Mn, where d represents the deuterium nucleus,1 ^2H Strategy To write the balanced nuclear equation, remember that the first isotope ^56 26Fe is the reactant and the second isotope ^54 25Fe is the product. The first symbol in ...

Verified Answer:

The abbreviation tells us that when iron-56 is bom...

Question: 20.1

The bond enthalpy of O2 is 498.7 kJ/mol. Calculate the maximum wavelength (nm) of a photon that can cause the dissociation of an O2 molecule. Strategy We want to calculate the wavelength of a photon that will break an O=O bond. Therefore, we need the amount of energy in one bond. The bond enthalpy ...

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First we calculate the energy required to break on...

Question: 20.1

Which of the following gases qualify as a greenhouse gas: CO, NO, NO2, Cl2, H2, Ne? Strategy To behave as a greenhouse gas, either the molecule must possess a dipole moment or some of its vibrational motions must generate a temporary dipole moment. These conditions immediately rule out homonuclear ...

Verified Answer:

Only CO, NO, and

NO_{2}

, which are...

Question: 20.3

The half-life of Rn-222 is 3.8 days. Starting with 1.0 g of Rn-222, how much will be left after 10 half-lives? Recall that radioactive decays obey first-order kinetics. Strategy All radioactive decays obey first-order kinetics. Therefore, its half-life is independent of the initial concentration. ...

Verified Answer:

After one half-life, the amount of Rn left is 0.5 ...

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