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If 77.0 mL of hydrogen gas is collected over water at 50.0 degrees celsuis and 763 mm Hg, what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5mm Hg at 50.0 degrees celsuis.
What is the velocity of an electron that has a de Brogile wavelength of 4.22 nm?
what species( ions/molecules)are present at the halfway point in the titration tword the stoichometric point in a.
Consider the reaction of Al and Al+3 and Mg and Mg+2. Which is the cathode and which is the anode
The reaction takes place in a bomb calorimeter where 4.50g of glucose are burned. What is the heat capacity of the bomb if the temp. of the water in the bomb increases from 22.75 degrees Celsius to 25.32 degrees Celsius? I used qrxn = -Ccal*change..
Draw an oxygen saturation curve for a cooperative protein that shows a p50 of 45 torr. On the same graph draw a c curve that shows a protein that is non-cooperative with p50 of 15 torr
WHen dimethyl ether (CH3OCH3) is burned, 1450 kj of heat are released per mole. How much heat is released when 3.89 grams of dimethyl ether is combusted
3H2 (g) + N2 (g) 2NH3(g), Kc = 6.0 × 10-2 at 500°C for this nitrogen fixation reaction. What is the equilibrium concentration of N2 If 0.250 M H2 and 0.050 M NH3 are present at equilibrium?
The rate of a chemical reaction can sometimes be determined by measuring the change in mass of the reaction flask and its contents with time
A certain second-order reaction (B--->products) has a rate constant of 2.00×10^-3 M^-1 s^-1 at 27 Celsius and an initial half-life of 214 s. What is the concentration of the reactant after one half-life
Use the periodic table to write electron configurations for each of the following elements. Represent core electrons with the symbol of the previous noble gas in brackets. S Ge Zr Sb
Determine that how many moles of molecular hydrogen are used per mole of the precatalyst in order to convert it entirely to platinum metal?
The partial pressure of O2 in the exhaust is 10.38 mmHg and the partial pressure of CO2 in the exhaust is 88.03 mmHg. What is the mole fraction of propane in the fuel stream
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