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Explain a 15.0% (w/w) NiCl2 (129.61 g/mol) solution has a density of 1.149 g/mL. Compute the molar concentration of NiCl2 in this solution.
If the 0.020 moles of HCl were added to 250 ml of de-ionized water instead of the buffer, what would be the pH be? Does this tell you if the buffer successful prevents large changes in pH
what is the intermediate of the photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene ? Draw the structure of this nternediate
Determine the activity of 50 mg of radium-226 (t1/2 =1600 years) in becquerels and in millicuries.
Data: C(graphite) + O2(g) => CO2(g) ?H = -393.5 kJ H2(g) + 1/2O2(g) => H2O(l) ?H = -285.8 kJ CH3OH(l) + 3/2O2(g) ? CO2(g) + 2H2O(l) ?H?? = -726.4 kJ Using the data above, calculate the enthalpy change for the reaction below. Reaction: C(graphite) ..
Consider the titration of a 23.0 mL sample of 0.110M HC2H3O2 with 0.130M NaOH. Determine the pH at 6.00 mL of added base.
A sample of water is collected over water at a total pressure of 616.8 mmHg at 300 C. The vapor pressure of water at 300 C is 31.8 mmHg.
Write the complete ionic equation for each reaction that produced a precipitate? Write the net ionic equation for each reaction that produced a precipitate?
You have 75.0 g of solute Q dissolved in 300-mL of water. The distribution coefficient between ether and water for solute Q is 8. a) How many extractions using 60-mL of ether each would you need to carry out to extract a total of 70.7 g (total) so..
The particle in a one dimensional box is sometimes utilized as a model for pi electrons in a conjugated bond system.
A gas filled balloon having a volume of 2.50L at 1.2atm and 25 degrees celsius is allowed o rise to the stratosphere where the temperature and pressure are -23 degrees celsius and 3.00x10^3 atm respectively,. Calculate the final volume of the ball..
use an orbital interaction diagram to draw the molecular orbitals oh H2+. Do you predict that this molecule will be stable? Explain your logic.
A 10.00 mL sample of vinegar is titrated with 0.5062 M NaOH and 16.58 mL is needed to reach the equivalence point. What is the molarity of the vinegar
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