1. Consider the following data: expect a BeF2 molecule to be linear but an SF2 molecule to be angular. Solubility in Water Melting (kg/kg H2O, 25oC) Point (oC) NaF 0.042 988 NaCl 0.357 801 NaBr 1.16 755 Nai 1.84 651 a) Explain the decreasing melting point from NaF to Nai. b) Explain th
1. Consider you would expect a BeF2 molecule to be linear but an SF2 molecule to be angular. 2. a) How would you designate the hybrid orbitals formed by "mixing" one d one s and two p orbitals? b) How many of the hybrid orbitals would be formed by the mixing? 3. Explain why C20H40 is a solid at 25oC, while C4H8 is a gas
1.Write equations for the neutralization reactions that result in the formation of the following salts: a) lithium carbonate b) copper (II) chlorate c) aluminum sulphate d) ammonium iodide 2.For each of the following situations, identify those for which a reaction is likely to occur. For those that do occur, write a net
1. A compound containing titanium (Ti) and chlorine is analyzed by converting all the titanium into 1.20g of TiO2 and all the chlorine into 6.45g of AgCl. What is the simplest formula for the original compound? 2. Estrone is a female sex hormone that is known to contain 80.0% carbon, 8.2% hydrogen, and the remainder oxygen. I
Can you please assist me with these problems? 1.Write the correct formula for each of the following manganese (II) iodine 2. Write the correct formula for each of the following ions flourate 3. Name the following compounds: a) BaHPO3 b) AgIO 4. Balance the following equations: i)PbCl2+AgNO3 → AgCl+
A drop of oil volume 0.05 cm3 is released from a medicine dropper on to a calm surface of a pond where it spreads out to cover an area of 40 cm2. Assume that the oil has a uniform thickness equal to the diameter of an oil molecule, calculate the diameter of an oil molecule, and express answer in scientific notation with the corr
A balloon contains 400cm3 of helium at 25 degrees and 1 atm pressure. If the balloon bursts when the volume exceeds 800cm3: a) What would be the maximum temperature it could withstand at constant pressure? b) What would be the minimum pressure it could withstand at constant tempersture? c) What height above sea level would
Pretend you are an atom. Take the number of your birth month (October) as your atomic number. Determine the configuration of electrons in your valence shell and see how you might interact with the other "atoms" in your group to form ions or new molecules.
1. What unusual aspect of water is responsible for it unique characteristics as both a liquid and as a solid? Give examples of how this property of water would affect food systems during processing. 2. The value of ∆G tells use what about chemical reactions? Give three situations and examples. 3. Chemical potential (μi)
A) Provide the type of measurement (volume, length, temperature etc.) for the following units: i) 298 K ii) 65 mL iii) 15 m iv) 290 kg v) 50 g b) Write the following measurements in scientific notation: i) 150000000 kg ii) 0.28 L iii) 0.00004 m c) Answer wheth
Lewis Structures and VSEPR (valence shell electron pair repulsion). See attached file for full problem description. 1. Listed in the attached document are electron dot formulas for several simple molecules and ions. All valence electrons are shown; however, electrical charges have been omitted deliberately. Which of the
Will a precipitate be observed if .10 mol Ag+ and .001 mol SO4^2- are added to make 1.0L of solution? (KSP= 1.4*10^-5)
1. What is the molecular formula of a compound? See attached file for full problem description.
Potential energy of a diatomic molecule is given by the Lennard-Jones potential, where A and B are constants. Find in terms of A and B, (a) the value r0 at which the energy is minimum and (b)the energy required to break up a diatomic molecule.(c) Evaluate r0 in meters and E in electron volts for the H2 molecule. In the caluculat
1. How many sigma (σ) and pi (π) bonds are in each of the following molecules? Molecule Number of σ bonds Number of π bonds Molecule Number of σ bonds Number of π bonds CO2 XeF3+ N2 Cl2CO CO32- ion BrO3_ 2. An iron atom is located in a molecule called an "iron-porphyrin" (or "heme") which has an import
1. Is the mayonnaise water soluble? 2. While making rice, a housewife adds too much salt to a pot containing rice and water and then brings the pot to a boil. Immediately realizing her mistake she decides to add more water to the pot believing this will remedy the mistake. What do you think? Will her mistake be rectified by a
Explain how to and construct orbital diagrams for gold, molybdenum, and antimony.
Sketch qualitative plots of the radial probability distributions vs. r for the orbitals 7s and 6g for the H atom.
Use the Radial Wave Function of a Hydrogen-like atom to calculate the radii of the 2 nodes of the 3s orbital in units of a0 for the H atom.
Please show how to solve the following problem: Repeat Millikan's oil drop experiment using a unit of your own devising (B) rather than the unit of Coulombs. You measure the charges on 4 different drops labeled a, b,c, d. You determine that drop a has charge 13.52 B, drop b has charge 3.359 B, drop c has charge 10.21 B, and
The major mineral ingredient in face or body powder is?
3. A material has an effectively full valence band and an empty conduction band. Explain why that if these two bands overlap the material behaves as a metal and if they are separated by a few electron volts in energy the material is an insulator. 4. Calculate the minimum energy a photon must have to produce an electron hole p
Which of the following species would you expect to be paramagnetic? Briefly explain the answers using molecular orbital energy level diagrams or molecular orbital electron configurations. N2, N2-, N2+, O2, N2^2- O2+, O2-, O2^2-
What is the coefficient of water when the attached equation is balanced?
How many atoms of C are in 1 mole of Carbon?
Complete the chart by filling in the correct ionic formulas. Cl- OH- O2- SO42- CO32- PO43- Na+ NH4+ K+ Ba2+ Ca2+ Mg2+ Fe2+ Cu2+ Al3+ Fe3+
How long would it take for a radioactive isotope with a half life of 2 weeks to lose at least 70% of its radioactivity? Describe two clinical uses of Radioactivity.
Calculate the wavelength in nanometers of the spectral line in the visible spectrum of hydrogen for which n1 = 2 and n2 = 3. What color is this line?
Use simple MO Theory (LCAO-MO) to explain why the dissociation energy of neutral N2 is greater than the N2+ ion, but that the dissociation energy of the O2+ ion is greater than the O2 neutral.
Express normal body temperature, 98.6 degF, in degC and K.