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Calculate the pH of a solution resulting from the titration of 50mL of 0.078M HCl with 25 mL of 0.083M NaOH. Give your answer to two decimal places.
How many grams of hydrogen gas are formed when 399.5 mL of 8.37 M HCl is used in the following reaction: Mg(s) + 2 HCl(aq) ? MgCl2(aq) + H2(g)
At a given temperature,0.0500 mol NO, 0.200 mol Cl2, and 0.550 mol CINO were placed into a 1.00 L container. The equilibrium below was established and 0.250 mol of CINO is present. Determine the equilibruim constant (Kc).
Calculate the standard enthalpy of the reaction, \Delta {{H}^\circ}_{\rm rxn}, for the thermite reaction: \rm 2Al(s) + Fe_2O_3(s) \rightarrow 2Fe(s) + Al_2O_3(s)
Why is it important to clean the surface of the zinc and copper electrodes with 1 M HNO3 immeadiately before using them in this experiment.
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
chlorine has two naturally occurring isotopes35cl isotopic mass 34.9689 amu and 37cl isotopic mass 36.9659 amu. if
Predict the type of bond (ionic, covalent, or polar covalent) one would expect to form for each bond.
Assuming levels of atmospheric CO2 are 390 ppm CO2, what is the pH of rainwater in equilibrium with the atmosphere for the pre-industrial atmospheric CO2 concentration of 280 ppm,v.
Using activity coeffient, calculate the pH of a 0.001M HCl solution. If you add a 0.010M solution of NaCl to this solution, will the pH increase, decrease or remain the same
A sample of drinking water collected from a suburban Boston municipal water system in 2002 contained 0.45 pCi/L of radon. Assume that this level of radioactivity was due to the decay
A 2+ ion of a particular element has an atomic mass of 203 and 123 neutrons in its nucleus, a) what is the nuclear charge in this element. Why? b) what are the symbol and name of this element? How do you know?
A solution of 0.1% sodium dodycl sulfate (SDS) binds so strongly to polypetide chains that one detergent molecule is sufficient to saturate two amino acid residues.
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