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A mixture of two miscible solvents that may be used as the solvent for a recrystallization experiment would be which of the following:
a.) One solvent cannot dissolve the sample when cold but can when hot
b.) One solvent cannot dissolve the sample when hot but can when cold
c.) One solvent cannot dissolve the sample when cold but slightly when hot
d.) One solvent cannot dissolve the sample if polar
e.) One solvent cannot dissolve the sample if non polar
Assume that methane is an ideal gas, the specific heat capacity of water to be constant and equal to 4.184 J/g/K over this temperature range, and the density of water to be 1.0 g/cm3. The combustion of methane is given byCH4 + 2 O2 ? CO2 + 2 H2O ?..
How many milliliters of a 0.28 M HCl solution are needed to react completely with 8.4 g of zinc to form zinc(II) chloride? Answer in units of mL.
An antacid tablet contraining calcium carbonate as an active ingredient required 9.53 mL or 0.0956 M H2S04 for comlete neutralization.
61.5 mL of 0.11 M sodium hydroxide were required to completely neutralize 23.7 mL of sulfuric acid. Calculate the concentration of the sulfuric acid solution
Assuming that the gas becomes saturated with benzene vapor and that the total gas volume and temperature remain constant, what is the vapor pressure of the benzene in torr
The optic nerve needs a minimum of 2.0x10^17 J of energy to trigger a series of impulses that eventually reach the brain.
If you are given sodium acetate and asked to make a .5 M acetate buffer at pH 4.75, will you have to add acid, base, or nothing in order to achieve the proper pH? What is the approximate pH after adding the sodium acetate?
An unknown salt is either NaF, NaCl or NaOCl.When 0.050 mol of the salt is dissolved in water for form 0.500 L of solution, the pH of the solution is 8.08. What is the identity of the salt?
how many moles of NaCl would be made by combining 20,000 moles of Na with 2 moles of Cl
Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 17?C.
Predict whether a precipitation reaction will occur when aqueous solutions of the following substances are mixed:
according to the following pKa values listed for a set of acids, which would lead to the strongest conjugate base?
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