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Compute the threshold frequency (Hz) of a metal if that metal emits an electron with a velocity of 3.28 × 105 m/s when illuminate with light that has a wavelength of 260 nm.
If 100mL of 0.01 M CaCl2, 100mL of 0.01 M Sr(NO3)2 and 100 mL of 0.01 M Na2SO4 are mixed together; what is the Ca2+ concentrationin solution and which precipitates will form?
A gas mixture with a total pressure of 750 contains each of the following gases at the indicated partial pressures: , 253 ; , 120 ; and , 173 . The mixture also contains helium gas.
Element X has two natural isotopes: X-6 (6.015 amu) and X-7 (7.016 amu). Calculate the atomic mass of the element X given the abundance of X-7 is 92.5%
The standard cell potential for the electrochemical reaction is 1.10V. Calculate the cell potential if the concentration of zinc ion and copper ion are 0.050M and 5.0M respectively at room temp.
Calculate the pH of 0.300 L of a 0.500 M NaHSO3 / 0.300 M Na2SO3 buffer before and after the addition of the following solutions. Assume that the volume remains constant.
Gold sells for $1120/oz. One ounce is equal to 28.35g. The molar mass of gold is 196.97g/mol. 1 moldovian franc contains 0.567g of gold. If 1 franc = $1.42, how many atoms of gold are presents in 0.010 moldovian francs?
imagine that as an employee of a pharmaceutical company you are working on an h-k-atpase. it is the enzyme that pumps
Draw the monobromination product that would be obtained from the radical bromination of methylcyclohexane? which product would obtained in greatest yield?
Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 3.00 multiplied by 102 mL of solution and then titrate the solution
How many moles of NH3 must be dissolved in water to give 50 mL of solution with a pH of 11.22
Explain what are the two modes for addition of hydrogen to 2-butyne. Label them cis & trans as well as E & Z
While a piece of platinum metal is added the gases react rapidly. Explicate the role of platinum in the reaction and how it affects equilibrium composition of the reaction mixture
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