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If the average fractional energy loss per collision in a material is 0.75, what will be the energy for a 1.98 MeV neutron after: A) 4 collisions? B) 19 collisions?
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4 = 5.074, l5 = 6.147 l6 = 7.903, l7 = 8.294. To wh..
the substitution reaction of (2R)-2-bromopentane and CH3O- undergoes substitution with NaOCH3.
The pH at one-half of the equivalence point in a weak acid-strong base titration
Calculating the Equivalent Weight of an Unknown Substance, An unknown organic carboxylic acid, mp = 139-141 degrees Celsius, is burned with a yellow, sooty flame. The sodium fusion test showed that nitrogen was present.
A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution
The acidic anion reacts with strong bases according to the following net ionic equation HC8H4O4-(aq) + OH- (aq)--->C8H4O4-2(aq) + H2O(l) If a 0.902g sample of KHC8H4O4 is dissolved n water and titrated to the equivalence point
A reaction has a rate constant of 0.0591 sec-1, how much of the compound (in mol/L) is left after 5.03 sec, if there was 0.770 mol/L at the start
Atkin's Physical Chemistry 9th edition. 10.14a. The ionization energy of Xe5p and F2p electrons are 12.1eV and 17.4 eV, respectively. Calculate the energies and composition of the bonding and antibonding orbitals of XeF. Use beta=-1.5eV and S=0.
A sample of helium gas occupies 1045 mL at 621 mmHg. For a gas sample at a constant temperature, determine the volume of helium at 745 mmHg.
explain why a glacial acetic acid in a conductance set-up does forms gradually brighter lights that is dim to bright
A bottle of 5.5 M acid has 21.3 mL remaining in it. If the acid is diluted to 700 mL, what is the new concentration of the acid?
Calculate the pH of the solution at the half equivalence point. Explain how the pH at the half equivalence point is related to Ka for the weak acid.
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