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The density of lead is 11.4 g/cm3 at 25°C. Calculate the volume occupied by 25.0 g of lead.
The combustion of one mole of ethanol (C2H5OH(l)) to produce carbon dioxide and gaseous water has ?Hr = -1235 kJ · mol-1 at 298 K. What is the change in internal energy for this reaction?
An electron microscope employs a beam of electrons to obtain an image of an object. What energy must be imparted to each electron of the beam to obtain a wavelength of 10.0pm? Obtain the energy in electron volts (eV) (1eV= 1.602x10^-19J )
How much PV work is done if 88.0 grams of C 2H 4 ethylene and 120 grams of hydrochloric acid HCl are permitted to react at atmospheric pressure and the volume change = -70.3 Litres?
at 90C the foll equilibrium is established, H2(g) + S(s)=H2S(g) K=6.8*10-2 If 0.2 mol of hydrogen and 1 mol of sulphur are heated to 90C in a 1L vessel.
A 14.0-g sample of CaCl2 is dissolved in 112 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C ..
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8)
Determine the mass of precipitate (in grams) that forms when 213.8 mL of 0.132 M CaCl2 solution is reacted with excess AgNO3 solution.
Isotope 1 has a mass of 120.9038 amu and a relative abundance of 57.4%, and isotope 2 has a mass of 122.9041 amu. What is the atomic mass of this element?
Both potassium chloride (KCL) and potassium hydroxide (KOH) are very soluble in water. However, as one increases the temperature of the solution, KCL becomes more soluble and KOH becomes less soluble. Explain
Yield of Reaction, Propene reacts with hydrobromic acid to yield 2-bromopropane via Markovnikov addition about the double bond of the alkene.
acetic acid has a Ka value of 1.8x10^-5. How many grams of NaC2H3O2 would have to be added to 100 ml of .1 M HC2H3O2 to prepare a buffer with a pH of 4.5?
If 17.2 mL of 0.800 M hydrochloric acid solution are required to neutralize 5.00 mL of a household NH3 solution, determine the molar concentration of the NH3,ammonia?
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