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In the transition metals (the d-block), the electron configuration of cations is different than what you might expect. Instead of the d electrons being lost first, s electrons are lost first. For example, the electron configuration of iron, Fe, is [Ar]4s23d6; but the electron configuration of Fe2+ is [Ar]3d6; the 4s electrons are eliminated to make the cation. Write out the electron configurations of
(a) Zn2+
(b) Pt2+
(c) Cr3+
(d) Ti4+
Calculate the final pressure of a gas if a 953-mL sample of the gas at 1.25 atm and 50.0 degrees Celsius is changed to 1.55 L at 75.0 degrees Celsius.Be sure to include units and correct significant figures
Chloroform, CHCl3, was once used as an anesthetic. Its vapor pressure is 197 mm Hg at 23 degrees Celsius, and 448 mm Hg at 45 degrees Celsius. Estimate its heat of vaporization and normal boiling point.
Calculate the kinetic energy of a K atom in the beam? b) Assuming that the molecules in the beam move one dimensionaly, what is the temperature of the beam?
An aqueous solution containing 35.0% by mass of an unknown covalent compund in water was found to have a freezing point of -3.5 deg C. Calculate the molar mass of the unknown compund.
Calculate the mass in grams of iodine (I2) that will react completely with 29.1 g of aluminum (Al) to form aluminum iodide (AlI3).
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
what the molarity of H2SO4 if 15.85 mL of the solution is needed to neutralize 1.00g NaHCO3 molar mass 84.01 g/mol
What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?
Averge frequency of light emitted a 100 w lightbulb is 5.5x10^14 Hz. How many photons per second does the light bulb emit?
Solid silicon and solid magnesium chloride form when silicon trichloride gas reacts with magnesium metal. Write a word equation and an unbalanced formula equation.
which gas sample contains the largest number of mole?
The value of Ka for monochloroacetic acid is 1.35 multiplied by 10-3. Calculate the pH of a 0.24 M solution of monochloroacetic acid.
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