General Chemistry I

Use this for “Find the de Broglie wavelength of an electron moving at 2.00 × 10⁶ m/s.”

Use this for “An electron is located to within 0.100 nm. What is the least uncertainty in its speed?”

Use this for “Use Slater’s rules to find the effective nuclear charge on a 2p electron of nitrogen.”

Use this for “Why is the first ionization energy of sulfur lower than that of phosphorus?”

Use this for “A sugar’s empirical formula is CH₂O and its molar mass is 180 g/mol. Find its molecular formula.”

Use this for “What volume of 0.100 M NaOH reacts completely with 25.00 mL of 0.150 M H₂SO₄?”

Use this for “Heating 3.00 g of a copper(II) sulfate hydrate leaves 1.92 g of CuSO₄. Find x in CuSO₄·xH₂O.”

Use this for “Find the pressure of 1.00 mol of CO₂ in 0.500 L at 300 K with the van der Waals equation (a = 3.59 L²·atm/mol², b = 0.0427 L/mol). Compare it with the ideal pressure.”

Use this for “Find the root-mean-square speed and the average kinetic energy per mole of N₂ molecules at 300 K.”

Use this for “Hydrogen is collected over water: 0.250 L at 25 °C and 755 torr in all. Water’s vapor pressure is 23.8 torr. How many moles of hydrogen were collected?”

Use this for “2KClO₃ → 2KCl + 3O₂. What volume of O₂ at 25 °C and 1.00 atm does 5.00 g of KClO₃ make?”

Use this for “0.6400 g of naphthalene, C₁₀H₈ (128.17 g/mol), burns in a bomb calorimeter of 10.00 kJ/°C, and the water warms by 2.570 °C. Find ΔU and ΔH of combustion at 25 °C.”

Use this for “Estimate ΔH for CH₄ + 2O₂ → CO₂ + 2H₂O(g) from the average bond enthalpies C–H 413, O=O 495, C=O 799 and O–H 463 kJ/mol.”

Use this for “In one resonance form of nitrate, NO₃⁻, nitrogen has one double bond, two single bonds and no lone pairs. Find its formal charge.”

Use this for “Find the lattice energy of NaCl from these values in kJ/mol: sublimation of Na 107, first ionization energy of Na 496, half the Cl–Cl bond energy 121, electron affinity of Cl −349 and ΔH°f of NaCl −411.”

Use this for “Draw the MO diagram of O₂ from its 12 valence electrons. Find the bond order and the unpaired electrons: is O₂ paramagnetic?”

Use this for “What is the strongest force between molecules of methanol, CH₃OH?”

Use this for “Rank CH₄, H₂O, HCl and He by normal boiling point, lowest first.”