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Which of the followingatoms should have the greatest polarizability?
consists of 323 mg of methane, 165 mg of argon, and 223 mg of nitrogen. The partial pressure of nitrogen at 275 k is 19 kPa. Calculate the total pressure of the mixture.
individual suffering from a high cholesterol level in her blood has 248 of cholesterol per 100 of blood. If the total blood volume of the individual is 5.4 , how many grams of total blood cholestero
The concentration of Cu2+ in one of the half cells is 1.5 * 10-3 M. what is the concentration of Cu2+ in the other half cell?
Assuming that atoms are spherical, calculate the fraction of space which is occupied by atoms (i.e., the packing efficiency) in a metal with a face-centered cubic unit cell.
The galvanic cell Zn (s) ¦ Zn2+(aq) ¦¦ Ni2+(aq) ¦ Ni (s) is constructed using a zinc electrode that weighs 32.68 g and is completely immersed in 325 mL. How long will it take for the cell to be comp
than standard enthalpy of formation of Zn2+(aq) is -153.9 kJ/mol. how much heat is evolved when 0.1047g of Zn(s) reacts with excess hydochloric acid?
Condisder the reaction, 3NO2(g) + H2O(l) --> 2 HNO3(aq) + NO(g), where TRIANGLE H=-137kJ. How many kilojoules are released when 82.8 g of NO2 reacts?
Experienced runners know that it is poor practice to ingest large amounts of glucose immediately before running a marathon. What is the metabolic basis for this apparent paradox?
Calculate the binding energy per nucleon (in MeV) for P-32 (atomic mass = 31.9739 u). mass H = 1.007825 u and mass n = 1.008665 u.
The solution has an osmotic pressure of 1.43 atm at 27°C. The analysis of this compound shows that it contains 41.8 percent C, 4.7 percent H, 37.3 percent O, and 16.3 percent N. Calculate the mo
The following reaction is first order with respect to NO and first order with respect to O2, and the rate constant is 5.0 x 104 M-1s-1: 2NO(g) + O2(g) --> N2O4(g)
What is the ratio of enrichment of U-235 after 34 diffusions of UF6? Gaseous diffusion is used to enrich natural uranium in U-235.
The precipitate that forms in the qualitative analysis of the chloride ions is AgCl. Determine the number of moles of AgCl that are produced by each mole of [Co(NH3)5Cl]Cl2.
What is the percent composition by mass of sulfur in the compound MgSO4 (gram-formula mass = 120. grams per mole)?
Calculate the freezing point of a solution containing 5.0 grams of KCl and 550.0 grams of water. The molal-freezing-point-depression constant for water is .86 °C/m.
Calculate the energy in J of a photon in the radar region of the electromagnetic spectrum that has a wavelength of 24.3 cm. Express answer in scientific notation.
A mole of photons in the blue visible region of the electromagnetic spectrum has an energy of 2.54 × 10 2 kJ/mol, calculate the frequency in s-1 of the photon. Express answer in scientific not
A toxicology studying mustard gas prepares a mixture of .675M SCl2 and .973 M C2H4 and allows it to react at room temperature (20.0 C). at equilibrium [S(CH2CH2Cl)2]=.350 M, calculate Kp.
A 4.05 g sample of a compound containing only C, H, and O was burned completely. The only combustion products were 10.942 g CO2 and 4.476 g H2O. What is the empirical formula of the compound?
Calculate the energy in kJ/mol of a mol of photons in the gamma ray region of the electromagnetic spectrum that has a wavelength of 4.13 pm. Express answer in scientific notation.
What effects does MnO2 catalyst have on the rate of evolution of O2 gas? Write a balanced equation for the decomposition of H2O2.
The pKa of the acid function at the 2-position is approximately 2, whereas that at the 1-position is about 3. Which of the two is the more acidic and why?
in one experiment, 0.3030 g of erythrosin b (M = 879.9 g/mol) was added to enough water to make 100.0 mL of solution A. 5.00 mL of solution A was added to enough water to make 100.0 mL of solution B
Several compounds have the molecular formula C3H6O2. Give a structural formula for each of these compounds and name them.