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Ethane gas, C2H6, burns in oxygen to form carbon dioxide gas and gaseous water. At constant 1.60 kJ of heat is evolved when 79.442 grams of ethane is burned. Write the thermochemical equation for this reaction, including labels for the all states of all reactions and products.
Calculate the pH at 25 degrees C of a 0.25-M aqueous solution of oxalic acid (H2C2O4). (Ka1 and Ka2 for oxalic acid are 6.5 x 10^-2 and 6.1 x 10^-5, respectively.)
A 20.0-mL sample of 0.25 M HNO3 is titrated with 0.15 M Na OH. What is the pH of the solution after 30.0 mL of NaOH have been added to the acid?
What volume of gaseous chlorine at STP would you need to obtain a 250.0 g sample of gas
what are the H3O+ and OH- concentrarions in a 125 mL solution prepared with 0.100 mol pf NaOH and water?
Why two different proteins that are both 1500 amino acids long would travel together through the polyacrylamide gel in a single band containing both of the two different proteins.
Calculate the wavelength of the photon emitted when an electron makes a transition from n=4 to n=3
a student placed 17.0 g of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
Consider the following reaction: 2Mg + O2 --> 2MgO , Rate = k[Mg][O2]^2 Part A What is the overall reaction order? Express your answer as an integer. Part B What are the units of the rate constant k for this reaction?
how much heat is produced in burning 7 mol of rmc2 rmh2 under standard conditions if both reactants and products are
The kinetics of double-stranded formation for a dodecamer containing two G.T base pairs was measured by temperature-jump kinetics. The reaction is
the density of aluminum is 2.7 g/cm cubed, if the volume of this object is 12ml, what is the mass of the grams?
How many moles of O2 will be produced if 4.83 moles of CO2 react completely?
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