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The energy needed to dislodge electrons from sodium metal via the photoelectric effect is 275k/mol. Explain what wavelength in nm of light has sufficient energy per photon to dislodge and electron from the surface of sodium
Suppose that a 25-mL sample of a solution is to be tested for I- ion by addition of 1 drop (0.20 mL) of 0.27 M Pb(NO3)2. What is the minimum number of grams of I- that must be present
At 25 °C and 765 Torr, carbon dioxide has a solubility of 0.0342 M in water. What is its solubility at 25 °C and 1470 Torr
Calculate the molality H3PO4 in the solution and Water is the solvent and the molarity of H3PO4 in the solution and the number of ml of the 85% H3PO4 that is required to make 800 ml of 2.00 M H3PO4?
Determine which of the following kinds of light contain enough energy to break chemical bonds in biological molecules by calculating the total energy in 1 mol of photons for light of each wavelength.
a fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. use boyles law to calculate the
Calculate the vapor pressure of a solution containing 25.3g of glycerin C3H8O3 in 125mL of water at 30.0C. The vapor pressure of pure water at this temperature is 31.8torr}
the frost melts due to the sun heating the surface of the car above the melting point B) the frost evaporates due to the sun heating the solid c) the frost cycles as does the saturation level of moisture in the winter air does from night to day Th..
When X-rays with ? = 1.937 Å are used, the second-order Bragg reflection from a set of parallel planes in a(n) cesium crystal is observed at an angle
What mass of iron (III) chloride in g is present in 2.50 ml of this solution
a compound of iodine and cesium contains 63.05 g of metal and 67.75 g of nonmetal. how many grams of cesium are in
The concepts of sensitivity and detection limit are often used interchangeably. Specify the difference between these two concepts.
Calculate the absorbent coefficient (e) when the absorbance of a 2.8 x 10^-4 M solution of proline at 280 nm is 0.45 and the path length is 1 cm
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