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What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 308 torr at 25 oC? (At 25 oC the vapour pressure of pure pentane is 511 torr and that of hexane is 150 torr.)
Draw the crystal-field energy level diagram for the 3d obitals and show the placement of d electrons assuming this is a weak-field complex ion.
Silver chloride often used in silver plating contains 75.27% Ag. Calculate the mass of silver chloride in grams required to make 4.0 g of silver plating.
What is the molarity of a solution prepared by adding 29.3 g of HNO3 to enough water to make 2 L of solution
Determine the mass of a mixture of 1.33x10^24 formula units of Sodium sulfate, 1.500 moles of Water and 3.77g of silver chloride?
How many grams of dry NH4Cl need to be added to 1.60 L of a 0.700 it M solution of ammonia, NH_3, to prepare a buffer solution that has a rm pH of 8.62? K_b for ammonia is 1.8 * 10^{-5}
Cobalt-60 is commonly used as a source of B-particles. How long does it take for 87.5% of a sample of cobalt-60 to decay, given that the half-life is 5.36 years?
Determine how many milligrams of H 2 O are present in sample If the freezing point of a 100.0g sample of 2-methyl-2-propanol =24.59C?
Calculate the mass of silver nitrate (in grams) in a 145 mL solution of 5.38 M AgNO3.
When there are branches in either the acid or the alcohol, how do you name the ester formed from the reaction of these two? For example,
if 2.29 moles of argon gas are added to 3.5L of a 6.58 mole sample of argon gas what is the final volume
Aluminum nitrate and ammonium chloride react to form aluminum chloride, nitrogen, and water. what mass of aluminum chloride is present after 74.7 g of aluminum nitrate and 56.8 g ammonium chloride have reacted completely.
At 10 degrees, Kc = 56.3 for the reaction below. H2 + Cl2 --> HCl
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