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The following charges on individual oil droplets were obtained during an experiment similar to Millikan's determine a charge
Calculate the wavelength of light necessary to provide photons of this energy? C) Explain why this film can be handled in a darkroom under red light.
A red laser pointer emits light with a wavelength of 650 nm. A) What is the frequency of the light. B) What is the energy of 1.00 mole of these photons
The stratospheric ozone layer helps to protect us from harmful ultraviolet radiation. It does so by absorbing ultraviolet light and falling apart into an molecule and an oxygen atom, a process known
Which type of bonding does Sr form upon solidification. metalic, molecular, ionic, covalent compund
A certain metal oxide has the formula MO where M denotes the metal. A 36.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules.
A certain quantum mechanical system (NOT the hydrogen atom) has the energy levels shown in the diagram below. The energy levels are indexed by a single quantum number n that is an integer.
Using the following thermochemical equation, determine the amount of heat produced per kg of CO2 formed during the combustion of benzene (C6H6). 2 C6H6(l) + 15 O2(g) ? 12 CO2(g) + 6 H2O(g) ?H°rx
The mass of substance B is 25.0g and its initial temperature is 52.0 degrees C. The final temperature of both substances at thermal equilibrium is 46.0 degrees C
What is the maximum number of moles of NH4V3O8 that can be prepared starting from 2.5 moles each of N2 and H2. Assume all other reactants are not limiting reagents.
What is the change in internal energy (in J) of a system that absorbs 0.330 kJ of heat from its surrounding and has 0.586 kcal of work done on it in scientific notation.
A gaseous mixture of NO2 and N2O4 is in equilibrium. If the concentration of NO2 is 8.1*10-4 M what is the concentration of N2O4
Find the solubility of AgI in 2.5 M NH3 (Ksp of AgI = 8.3x10^-17 and Kf of Ag(NH3)^2+ = 1.7X10^7)
Which of the following are more soluble in acidic solution than in pure water. Ca(OH)2 Mg3(PO4)2 PbBr2
Calculate the molar solubility of Ca(IO3)2 in each solution below. The Ksp of calcium iodate is 7.1x10^-7. a.) 0.065 M Ca(NO3)2 b.) 0.065 M NaIO3
Decide whether aqueous solutions of the salts a-h are acidic / basic / or neutral. For each ion that hydrolyzes write the hydrolysis equation. acidic/basic/neutral and hydrolysis equation
A weak base indicator (In) may be considered to be in equilibrium with HIN+ and OH- ions. The color of the non-ionized molecule is green and that of HIn+ is yellow. What would be the color of this i
A solution of aqueous ammonia was titrated with HCL using phenolphthalein as the indicator a) is phenolphthalein an appropriate indicator for this titration? why or why not? b) choose another indic
a) For a weak acid or base the degree of ionization increases with dilution. Explain. b) consider the solutions .01 M HNO3 / .10 M HCL / .01 MHNO2. which solution has the highest ph
A 0.010 M HCN solution is .020% ionized. Calculate the concentration of H3O+ of this solution. Please show work and solution.
The polyyne molecules CkH2 with alternating triple and single carbon-carbon bonds represent potential nanowires for molecular electronics. They can be modelled as linear 1D-boxes with 2k
Compare the relative greenness of this approach to at least one other extraction method: steam distillation or solvent extraction. List the green chemistry principles that differentiate the two appr
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 77°C. Weights are removed suddenly from the piston to give the following sequence of thr
Calculate the change in entropy that occurs when 18.66 g of ice at -14.6°C is placed in 54.05 g of water at 100.0°C in a perfectly insulated vessel.