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chemistry
physical chemistry
Questions and Answers of
Physical Chemistry
Make a table of all the possible values of m ℓ and ms when ℓ = 4. What is the lowest value of the principal quantum number for this to occur?
a. Predict the electron configurations of Sc through Zn. b. From a source of actual electron configurations, determine how many exceptions there are from your predictions in part a.
a. Predict the electron configurations of Ga through Kr. b. From a source of actual electron configurations, determine how many exceptions there are from your predictions in part a.
Bi (atomic number 83) is used in some stomach discomfort relievers. Using its place on the periodic table, predict its valence shell electron configuration.
Which atom has a higher ionization energy (IE), O or P?
Which atom has a higher IE, F or As?
Which atom has a smaller radius, As or Cl?
Which atom has a smaller radius, K or F?
What is the wavelength of light if its frequency is 1.00 s−1?
How many IEs does a Be atom have? Write the chemical reactions for the successive ionizations.
What is the energy of a photon if its wavelength is 1.00 meter?
What is the energy of a photon if its frequency is 1.00 s−1?
If visible light is defined by the wavelength limits of 400 nm and 700 nm, what is the energy range for visible light photons?
Domestic microwave ovens use microwaves that have a wavelength of 122 mm. What is the energy of one photon of this microwave?
Use the equation for the wavelengths of the lines of light in the H atom spectrum to calculate the wavelength of light emitted when n is 7 and 8.
Use the equation for the wavelengths of the lines of light in the H atom spectrum to calculate the wavelengths of light emitted when n is 5 and 6.
Make a table of all the possible values of the four quantum numbers when the principal quantum number n = 5.
Identify the most significant intermolecular force in each substance.1. HF2. HCl
What is the energy change when 108 g of C6H6 freeze at 5.5°C?
What is the energy change when 822 g of C2H5OH(ℓ) boil at its normal boiling point of 78.3°C?
Use Figure 10.8 to estimate the boiling point of ethanol at 400 torr.
Predict the type of crystal exhibited by each solid. 1. I2 2. Ca(NO3)2
Identify the strongest intermolecular force present in each substance. a. He b. CHCl3 c. HOF
Identify the strongest intermolecular force present in each substance. a. CH3OH b. (CH3)2CO c. N2
Identify the strongest intermolecular force present in each substance. a. HBr b. C6H5NH2 c. CH4
Identify the strongest intermolecular force present in each substance.a. C10H22b. HFc. glucose
The ∆Hsub of I2 is 60.46 kJ/mol, while its ∆Hvap is 41.71 kJ/mol. What is the ∆Hfus of I2?
What is the energy change when 78.0 g of Hg melt at −38.8°C?
What is the energy change when 30.8 g of Al solidify at 660°C?
What is the energy change when 111 g of Br2 boil at 59.5°C?
What is the energy change when 98.6 g of H2O condense at 100°C?
Each of the following statements is incorrect. Rewrite them so they are correct. a. Temperature changes during a phase change. b. The process of a liquid becoming a gas is called sublimation.
What is the difference between evaporation and boiling?
What is the difference between a gas and vapor?
Referring to Figure 10.8, estimate the boiling point of ethanol at 200 torr.
Referring to Figure 10.8, at approximately what pressure is the boiling point of water 40°C?
Predict the type of solid exhibited by each substance. a. Hg b. PH3 c. CaF2
Predict the type of solid exhibited by each substance. a. SO3 b. Br2 c. Na2SO3
Predict the type of solid exhibited by each substance. a. BN (boron nitride, a diamond-like compound) b. B2O3 c. NaBF4
Predict the type of solid exhibited by each substance. a. H2S b. Si c. CsF
Predict the type of solid exhibited by each substance. a. Co b. CO c. CaCO3
Explain how the bonding in an ionic solid explains some of the properties of these solids.
How many grams of solid water can be melted with 1.55 kJ of energy?
How many grams of Hg can be vaporized using 29,330 J of energy?
The ∆Hsub of naphthalene (C10H8) is 72.6kJ/mol. What energy is needed to sublime 100.0 g of C10H8?
A solution is made by dissolving 3.33 g of HCl(g) in 40.0 g of liquid methyl alcohol (CH3OH). Identify the solvent and solute in the resulting solution.
Using concentration as a conversion factor, how many liters of 0.0444 M CH2O are needed to obtain 0.0773 mol of CH2O?
What mass of solute is present in 1.08 L of 0.0578 M H2SO4?
What volume of 0.512 M NaOH will react with 17.9 g of H2C2O4(s) according to the following chemical equation?H2C2O4(s) + 2NaOH(aq) ( Na2C2O4(aq) + 2H2O(ℓ)
A student titrates 25.00 mL of H3PO4 with 0.0987 M KOH. She uses 54.06 mL to complete the chemical reaction. What is the concentration of H3PO4?H3PO4(aq) + 3KOH(aq) ( K3PO4(aq) + 3H2O
Use the balanced chemical reaction for MnO4− and H2O2 to determine what mass of O2 is produced if 258 g of 3.00% m/m H2O2 is reacted with MnO4−.2MnO4−(aq) + 5H2O2(aq) + 6H+(aq) ( 2Mn2+(aq) +
A solution is made by mixing 33.8 g of CH3OH in 50.0 g of H2O. What is the mole fraction of CH3OH in the solution?
A solution is made by mixing 33.8 g of C6H12O6 in 50.0 g of H2O. If the vapor pressure of pure water is 25.7 torr, what is the vapor pressure of the solution?
What is the boiling point of a 6.95 m solution of C12H22O11 in H2O?
What is the freezing point of a 3.05 m solution of CBr4 in C10H8?
What is the osmotic pressure of a 0.0522 M solution of C12H22O11 at 55°C?
What is the van’t Hoff factor for Fe(NO3)3?
Determine the boiling point of a 0.887 m solution of CaCl2 in H2O.
What is the molarity of a solution made when 66.2 g of C6H12O6 are dissolved to make 235 mL of solution?
How many moles of solute are present in 225 mL of a 1.44 M CaCl2 solution?
What volume of a 0.570 M K2SO4 solution is needed to obtain 0.872 mol of solute?
What is the mass percentage of H2O2 in a solution with 1.67 g of H2O2 in a 55.5 g sample?
If there is 0.551 mg of As in 348 g of solution, what is the As concentration in ppm?
The concentration of Fe3+ ion in a sample of H2O is 335.0 ppm. What mass of Fe3+ ion is present in 3,450 mL of H2O, which has a density of 1.00 g/mL?
A 0.885 M solution of KBr whose initial volume is 76.5 mL has more water added until its concentration is 0.500 M. What is the new volume of the solution?
Which solvent is NaOH more likely soluble in—CH3OH or C6H6?
Compounds with the formula CnH2n + 1OH are soluble in H2O when n is small but not when n is large. Suggest an explanation for this phenomenon.
Define saturated, unsaturated, and supersaturated.
What volume of 1.772 M BaCl2 is needed to obtain 123 g of BaCl2?
What are the individual ion concentrations and the total ion concentration in 0.66 M Mg(NO3)2?
What are the individual ion concentrations and the total ion concentration in 1.04 M Al2(SO4)3?
If the C2H3O2- ion concentration in a solution is 0.554 M, what is the concentration of Ca(C2H3O2)2?
If the Cl- ion concentration in a solution is 2.61 M, what is the concentration of FeCl3?
Differentiate between mass percentage and parts per thousand.
What is the molarity of a solution made by dissolving 13.4 g of NaNO3 in 345 mL of solution?
What is the molarity of a solution made by dissolving 332 g of C6H12O6 in 4.66 L of solution?
How many moles of MgCl2 are present in 0.0331 L of a 2.55 M solution?
How many moles of NH4Br are present in 88.9 mL of a 0.228 M solution?
What volume of 0.556 M NaCl is needed to obtain 0.882 mol of NaCl?
What volume of 3.99 M H2SO4 is needed to obtain 4.61 mol of H2SO4?
What volume of 0.333 M Al(NO3)3 is needed to obtain 26.7 g of Al(NO3)3?
How much water must be added to 1.55 L of 1.65 M Sc(NO3)3(aq) to reduce its concentration to 1.00 M?
A 1.88 M solution of NaCl has an initial volume of 34.5 mL. What is the final concentration of the solution if it is diluted to 134 mL?
A 0.664 M solution of NaCl has an initial volume of 2.55 L. What is the final concentration of the solution if it is diluted to 3.88 L?
If 1.00 mL of a 2.25 M H2SO4 solution needs to be diluted to 1.00 M, what will be its final volume?
If 12.00 L of a 6.00 M HNO3 solution needs to be diluted to 0.750 M, what will be its final volume?
If 665 mL of a 0.875 M KBr solution are boiled gently to concentrate the solute to 1.45 M, what will be its final volume?
If 1.00 L of an LiOH solution is boiled down to 164 mL and its initial concentration is 0.00555 M, what is its final concentration?
How much water must be added to 75.0 mL of 0.332 M FeCl3(aq) to reduce its concentration to 0.250 M?
Using concentration as a conversion factor, how many moles of solute are in 3.44 L of 0.753 M CaCl2?
What volume of 0.779 M NaCl will react with 40.8 mol of Pb(NO3)2?Pb(NO3)2 + 2NaCl ( PbCl2 + 2NaNO3
What volume of 0.905 M H2SO4 will react with 26.7 mL of 0.554 M NaOH?H2SO4 + 2NaOH ( Na2SO4 + 2H2O
What volume of 1.000 M Na2CO3 will react with 342 mL of 0.733 M H3PO4?3Na2CO3 + 2H3PO4 ( 2Na3PO4 + 3H2O + 3CO2
It takes 23.77 mL of 0.1505 M HCl to titrate with 15.00 mL of Ca(OH)2. What is the concentration of Ca(OH)2? You will need to write the balanced chemical equation first.
It takes 97.62 mL of 0.0546 M NaOH to titrate a 25.00 mL sample of H2SO4. What is the concentration of H2SO4? You will need to write the balanced chemical equation first.
It takes 4.667 mL of 0.0997 M HNO3 to dissolve some solid Cu. What mass of Cu can be dissolved?Cu + 4HNO3(aq) ( Cu(NO3)2(aq) + 2NO2 + 2H2O
It takes 49.08 mL of 0.877 M NH3 to dissolve some solid AgCl. What mass of AgCl can be dissolved?AgCl(s) + 4NH3(aq) ( Ag(NH3)4Cl(aq)
What mass of 3.00% H2O2 is needed to produce 66.3 g of O2(g)? 2H2O2(aq) ( 2H2O(ℓ) + O2(g)
A 0.75% solution of Na2CO3 is used to precipitate Ca2+ ions from solution. What mass of solution is needed to precipitate 40.7 L of solution with a concentration of 0.0225 M Ca2+(aq)? Na2CO3(aq) +
Using concentration as a conversion factor, how many moles of solute are in 844 mL of 2.09 M MgSO4?
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