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A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.570 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water? Assume room temperature or about 298 K
Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g..
A free particle of mass m in a one-dimensional box with infinite walls at x=0 and x=L, given by the potential function: V(x)= 0 for x =0 L
Calculate the molar solubility and the solubility of iron (II) hydroxide in pure water then in 0.125M NaOH(aq).
This point we have magnesium ions in solution and fluoride ions in solution. Remember the Ksp of MgF2 is equal to 3.7 x 10^-8 at room temperature
Determine the pH of (a) a 0.20 M NH3 solution, (b) a solution that is 0.20 M in NH3 and 0.30 M NH4Cl
Write the equation for the esterification reaction between ethanol and acetic acid (ethanoic acid), Write the equation for the esterification reaction between ethanol and acetic anhydride(ethanoic acid anhydride)
Which of the following is the best reason as to why increasing the NaCl concentration increases the temperature at which the two strands of DNA "melt" apart
If the average human body discharges 536 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft? Answer in units of mol.
If 5.0 g of H2 are reacted with excess CO, how many grams of CH2OH are produced, based on a yield of 86%?
sample of carbon monoxide gas occupies a volume of 0.225 L. The gas is transferred to a 1.50-L flask and the temperature is reduced to -15 degrees C. What is the pressure of the gas in the flask?
a 31 l tank contains a gas under a pressure of 617 atm. what volume would the gas occupy at the same temperature at 900
Using the balanced equation: 2NaCl(s)+ 1H2SO4(aq)= 2HCl(aq)+1Na2SO4(aq) a. If 20. G of NaCl are used, and only 5.6 g of HCl are isolated, what is the percent yield of HCl? b. If only 5.6 g of HCl are obtained, how many grams of Na2SO4 must also ha..
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