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Volume of A piece of galena is 4.7 cm3. Determine the mass of that piece of galena if the density of galena is 7.5 g/cm3 express your answer (in kg)?
Suppose an insulated system having eighty grams of liquid water and eighty grams of ice at equilibrium under normal atmospheric pressure. A total of sixteen grams of steam at the temperature of 120 degree Celsius is admitted to the system. Determine the phase composition and temperature at the time when equilibrium is reestablished?
Use resonance forms to show the delocalization (over four carbon atoms) of the negative charge of the benzyl and anion
When light of frequency 6.88×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
Write a detailed mechanism for this reaction that accounts for the net retention of detailed mechanism for this reaction that accounts for the net retention of configuration when Ag+ and a low concentration of hydroxide are used.
0.250 g of a binary unknown acid, HX, requires 31.96 mL of a 0.09668M NaOH solution when titrated. What is the identity of the unknown acid.
53.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 189 mL of water.
Tuning proton affinity. The pKa of an acid depends part,y on its environment. Predict the effect of each of the following environmental changes on the pKa of a glutamic acid side change.
Calculate the amount of energy released in the formation of one mole of BaO bonds(not Lattice energy) The radius of the barium ion is 1.35 Angestrom
What is the de Broglie wavelength in cm, of a 12.9 g hummingbird flying at 1.14 102 mph? (1 mile = 1.61 km.)
How many grams of F- must be added to a cylindrical water reservoir having a diameter of 8.88 × 102 m and a depth of 78.88 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
How much heat is required to warm 1.20 L of water from 20.0 degrees C to 100.0 degrees C ? (Assume a density of for the water.)
What is the molarity of urea, CO(NH2)2, if 98.3 mg of the 97.9% pure solid is dissolved in 5.00 ml of aqueous solution?
A cube of metal measuring 14.2 mm on a side is placed in a graduated cylinder containing 25.3 mL of water. What is the final volume of reading in the measuring cylinder
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