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The modulus of elasticity for a ceramic material having 5.5 vol%porosity is 319 GPa.(a) Calculate the modulus of elasticity (in GPa) for the nonporousmaterial.(b) At what volume fraction porosity will the modulus of elasticitybe 278 GPa?
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A reading of 414 units was obtained for the intensity of the 671 nm red emission line. Then 1.00 mL of a 11.9 mM Lithium sta..
Calculate the unit-cell edge length of the densest diamond. Assuming the cell dimensions are fixed, how many C atoms are in the unit cell of the diamond with the lowest density
a balloon is filled with 500.0 ml of helium at a temperature of 27 degrees celsius and 755 mm hg. as the balloon rises
the percentage of se in peroxidase anhydrous enzyme is 0.5 by weight atomic weight 78.4. then minimum molecular weight
Hypohalic acid, HOX, is a weak acid with a Ka of 3.341x10-8. What is the pKb for the hypohalite anion, OX-, in a 0.8865 M solution of KOX
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 251.0 Torr at 45.0 °C. Calculate the value of H°vap for this liquid. What is the original boiling point
The question is to write a mechanism for the reaction of acetophenone with an excess of ethyl magnesium bromide in the presence of hydrochloric acid.
A student constructs a coffee cup colrimeter and places 50 ml of water into it. After a brief period of stabilization, the temp of the water in the calorimeter is 23.5 celsius
The synthesis of Amyl acetate by alcohol and anhydride, there are some chemicals be provided: Potassium carbonate, Calcium carbonate, Sodium sulfate
the value of electronegativity for magnesium 1.2 and the value for oxygen is 3.5. determine what type of bond is
At constant pressure and 25 degrees celcius a sample of gas occupies 4.5 liters. At what temperature will the gas occupy 9.0 liters?
Sodium fluoride is added to many municpal water supplies to reduce tooth decay. Calculate the pH of a 0.00339 M solution of NaF at 25 degrees
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