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A student drops an object out the window of the top floor of a high-rise dormitory.
(a) Neglecting air resistance, how fast is the object traveling when it strikes the ground at the end of 3.0 s? First use standard British units, and then express the speed in mi/h for a familiar comparison. Can things dropped from high places be dangerous to people below?
(b) How far, in meters, does the object fall during the 3.0 s? Comment on how many floors the dormitory probably has.
Initially a mixture contains 0.760 mol each of N2 and O2 in an 8.26-L vessel. Find the composition of the mixture when equilibrium is reached at 3900°C. For the reaction below, the Kc = 0.0123 at 3900°C.
In a given diffusion apparatus, 15.0ml of HBr gas diffused in 1.0min . In the same apparatus and under the same conditions, 20.3 mL of an unknown gas diffused in 1.0 min. The unknown gas is a hydrocarbon.
A volume of 40.0 of aqueous potassium hydroxide () was titrated against a standard solution of sulfuric acid (). What was the molarity of the solution if 19.2 of 1.50 was needed? The equation is 2KOH(aq)+H2SO4(aq)=K2SO4(aq0+2H2O(l)
Problem- Based on analysis of the spectra, a molecule with the formula C9H10O3 has been determined to contain the following- A para-substituted benzene ring,
Choose the answer in which the three atoms and/or ions are listed in order of increasing EXPECTED size (smallest particle listed first) assuming that the simple shell model of the atom is correct.
Problem- Given that P*(H2O)=0.02308 atm and P(H2O)=0.02171 atm in a solution in which 0.207 kg of a non-volatile solute(M=298g/mol)is dissolved in 0.892kg water at 293K, calculate the activity of and activity coefficient of water in the solution
Silver metal has a density of 10.5 g/cm3. how many silver atoms are in a cube that measures 5.00cm on each side
What is the de Broglie wavelength in cm, of a 12.7 g hummingbird flying at 1.15 multiplied by 102 mph (1 mile = 1.61 km.)
Explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio of the yeast reduction product could not be determined by 1 H NMR.
what will be the percentage (%) of final solution after mixing 20% 200 gram NaCl solution with 50% 100 gram NaCl solution and addition of 200 gram water into the mixture
a solution is prepared by dissolving 23.7g of CaCl2 in 375g of water. The density of the resulting solution is 1.05g/mL.
Would the methylene chloride/water distribution coefficient be expected to be greater than 1 or less than 1 for aniline in methylene chloride and 1M NaOH? With 1M HCl
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