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What is the speed of an electron ejected from a metallic surface, where the metal work function is 2.06 eV and the radiation is at the following wavelengths: (a) 800nm (b) 600nm (c) 300nm. Assume the electrons are ejected to vacuum.
for a certain change the value of U is -2.37 kJ. During the change, the system absorbs 650 joules. how much work did the system do.
When 64.5 g of HCl are allowed to react with 17.6 g of O2, 50.4 g of Cl2 are collected. Determine the limiting reactant, theoretical yield of Cl2 and percent yield for the reaction.
Given that the rate constant is 4.0×10-4 at 25.0 degrees C and that the rate constant is 2.6×10-3 at 42.4 degrees C, what is the activation energy in kilojoules per mole?
Determine delta H of this reaction (kJ/mol H 2 SO 4 ) - When 24.4 mL of 0.500M sulphuric acid ,H 2 SO 4 is combined to 24.4ml of 1.00M potassium hydroxide KOH in a coffee cup calorimeter
A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene.
Calculate the number of moles of NaHCO3 that reacted in each beaker. (The molar ratio between evolved CO2 and the bicarbonate is 1:1.
Identify what complementary functional group would need to be present in the neuraminidase active site for (a) hydrogen bonding and (b) ioic interactions to oseltamivir to be observed?
If a reaction mixture initially contains 486 of and 261 of , what is the mole fraction of when equilibrium is reached.
Determine the molecular weight of a compound given the gas phase data: mass of 11.8 g, temperature of 39.1 C, pressure of 630 torr, volume of 1.31 L.
How many moles of O2 are needed to burn 1.05 mol of C8H18
If a bottle of nail polish remover contains 151 g of acetone, how much heat would be released by its complete combustion?
A volume of 725 mL of a gas is collected at 105 degrees C and 746 torr. The gas sample weighs 1.92 grams. what is the gas.
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