What is the total energy
What is the total energy, in kJ, needed to raise 20 g of CH4O (methanol) from - 120 °C to 100 °C? Show your work.
(Change in Hvap=37.4 kJ/mol, Change in Hfus=3.18 kJ/mol, C CH4O(s)=68.39 J/mol, C CH4O(l)=81.56 J/mol, C Ch4O(g)= 44.06 J/mol)
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A solution is prepared by diluting 225 mL of 0.1885 M aluminum sulfate solution with water to a final volume of 1.450 L. Calculate the number of moles of aluminum sulfate before dilution.
or a certain reaction, kc=2.2*10^_4 and kf=0.284 M^-2 *s^-1. Calculate the value of the reverse rate constant, kf, given that the reverse reaction is of the same molecularity as the forward reaction.
Nee High and Low Jack are partners in an accounting firm and share net income and loss equally. High's beginning partnership capital balance for the current year is $285,000, and Jack's beginning partnership capital balance for the current year
Assuming each quadrant of the pizza to be the same, find the center of mass of the uneaten pizza above the axis (that is, the portion of the pizza in the second quadrant). Find the -coordinate.
If the vial weights 185.56 g when filled with liquid mercury (d=13.53 g/cm^3), what is its volume? How much would the vial weight if it were filled with water (d=0.997 g/cm^3 at 25 C)?
What is the freezing depression if .25 moles of sodium chloride was dissolved in 350ml of water?
A transformer connected to a 120-V (rms) ac line is to supply 12. V (rms) to a portable electronic device. The total equivalent resistance of the system is 5.0 Ohm. What should the ratio of primary to secondary turns of the transformer be?
Compute the variable overhead rate and efficiency variances. What relation can you see between this efficiency variance and the labor efficiency variance?
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