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A mole of hydrogen atoms contains 6.02 x 1023 atoms and occupies 22.4 L. How many hydrogen atoms are contained in 25.00 mL of this gas?
My answer is 1.505x10^6moles
Is the answer correct with the correct amount of significant digits?
Consider the reaction 2NO2(g)--> N2O4(g). Go = -5.40 kJ at 298K. (b) Calculate delta G at 298K if partialpressures of NO2 and N2O4 are 0.36 atm and 1.60 atm
If 8.32 grams of methanol, CH3OH, are dissolved in 10.3 grams of water, what is the mole fraction of methanol in the solution?
Draw a mechanism to demonstrate how pyridine catalyzes the hydrolysis of acetic anhydride to two molecule of acetic acid. Is this reaction reversible? why or why not?
A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calcu late the mass of pure acetic acid in 480 mL of this solution at 20 C
Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the anode of a voltaic cell?
how would you prepare 100ml of 0.5M NaOH? Calculate the mass of NaOH needed, and describe the procedure and glassware you would use.
Is the central carbon atom sp2- or sp-hybridization? What about the hybridization of the terminal carbons? What shape do you predict for allene?
If a total of 13.5 mol NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of COs and NA3C6H5O7 will be produced? 3NaHCO3(aq) + C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
Calculate the Ka for the acid. The initial concentration of the acid is 0.010m?
How many grams of lanthanum chloride LaCl3 must be added to 1 kg of water to lower the freezing point of water by 1.1 degrees C?
In the titration of ascorbic acid with potassium iodate in the presence of potassium iodide, what happens when an excess of potassium iodate
A reversible adiabatic expansion of NO2 (g) from an initial V=20dm^3 and an initial T=300K to a final P=1bar. Find Vf, Tf, and the change in entropy for both the system and surroundings.
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