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What is the equilibrium concentration of ammonium ion in a 0.51 M solution of ammonia (NH3, Kb = 1.8 x 10-5) at 25oC?
Cheetas are the fastest land mammals and are capable of sprinting at 27.8 m/s in short bursts. How long would it take a cheetah to run the length of a 100 yard football field running at this top speed, assuming 1 yard is 0.914 m?
some workers responding to the explosion at the Chernobyl nuclear power plant were exposed to 5 sv of radiation, resulting in the death for many of them. if the exposure was primarily in the form of y rays with energy of 3.3 x10^ -14 J
Define the same radiation ejects electrons from rubidium atoms with a velocity of 2.45 x 10^6 m/s. Explain what are the ionization energies in eV of the two elements
An unknown mass of each of the following substances, initially at 22.0^circ C, absorbs 1950 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. a. Pyrex glass (T_f=55.1^circ C. B.sand (T_f=62.3^circ C). C.et..
calculate the mass of sulfuric acid that could potentially form as acid rain from burning 110kg of this type of coal.
Which of the following properties indicates the presence of strong intermolecular forces in a liquid
Determine the osmotic pressure (in Torr) for a 50 mL solution containing 30.22 mg of protein with the molar mass
keisha wants to measure how the temperature of a gas affects its volume. explain which variable she should change which
What is the enthalpy change for the combustion of 12.5 g C4H10 in excess oxygen? C4H10 g + 13/2 O2 g = 4 CO2 g + 5 H2O g H= -1895 kJ
What are reasons as to why 9 carat gold is often used instead of pure gold to make jewelery?
What is the difference between a lytic and a lysogenic replication cycle? How does this describe the replication cycle of HIV?
An aqueous solution containing 9.47 g of an optically pure compound was diluted to 200.0 mL with water and placed in a polarimeter tube 20.0 cm long.
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