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Epsom salts are hydrates of magnesium sulfate. The formula for Epsom salts is MgSO4 . xH2O. A 7.834g sample is heated until a constant mass of 3.825g is obtained, indicating that all the water has been evaporated off. What is the value of x in the formula of this hydrate?
The PH° of formation values for water vapor and liquid water are -241.82 and -285.83 kJ/mol, respectively. Calculate the PH° of vaporization for water in kJ/mol.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 88.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 300.0 mL of solution. What is the molarity of the ethanol in this solution?
distillation is frequently used to isolate the nonvolatile organic solute from a solution containing an organic
What is the difference in entropy between ethanol's liquid and gaseous states at 351.44 K? What I'm asking is what is the size of the "jump" on the Sm versus Temperature curve.
a solution containing 0.555 g of an organic solid in 22.0 ml of distilled water shows a freezing point depression of
If 10.0mL of a 3.00x10-1 M Fe(NO3)3 in 0.500M HNO3 solution is placed in a volumetric flask and then diluted to 50.0mL total volume, what will be the concentration of Fe+3
If you have 400mL of .5 M NH3, how many moles of .47 M HCl must be added to the ammonia solution to reach the equivalence point.
Is copper complex of tetraphenylporphyrin(TPP) more polar or less polar than tetraphenylporphyrin(TPP) itself?
The inclined plane is supported by a horizontal table. Both the cube and the inclined plane can move without friction along the surfaces that support them (the inclined plane and the table, respectively). What is the normal force on the inclined p..
Determine what mass of titanium displaces 65.6mL of H 2 O at the temperature 25 degree Celsius if the density of titanium metal is 4.51 g/cm 3 at the temperature of 25 ° C .?
5.0 mL of 12 M NH3 is added to 500 mL of 0.050 AgNO3. What concentration of silver ion will exist after equilibrium is established. [Kf for Ag(NO3)2 is 1.5 x 10^7]
at 400 K, the rate of decomposition of a gaseous compound initially at a pressure of 12.6 kPa, was 9.71 Pa/s when 10.0 % had reacted and 7.67 Pa when 20.0 % had reacted.Determine the order of reaction.
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