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A 0.567 m aqueous solution of a monoprotic acid (HA) freezes at -2.07°C. Find the pKa of this monoprotic acid. Kfof water = 1.86 °C/m
a volume of 18.0 m l contains a mixture of 0.250 mole n2 0.250 mole o2 and an unknown quantity of he. the temperature
if 40.0 kJ of energy is absorbed by 500.0 g of water at 10.0 degrees celcius what is the final temperature of water?
A solution is prepared by mixing 63.0 mL of 5.00 M HCl and 20.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
If the electrons after S_x measured are sent through a Stern - Gerlach analyzer to measure S_z(spin momentum along z-axis) again, what values will be found? with what probabilities will these values occur?
1. The melting temperature ( Tm ) of a sample of poly(decamethylene adipate) with a number-average degree of polymerization ( xn ) of 3 was found to be 65oC. Tm was found to be 75oC for a sample of the same polymer with xn =10. Estimate the equil..
Equal Numbers of moles of H2 gas and I2 vapor are mixed in a flask and heated to 700 degrees celcius. The initial concentration of each gas is 0.0088 mol/L and 78.6% of the I2 is consumed when equlibrium is achieved according to the equation
write four balanced equations for the reactions to separate and recover m-nitroanilin benzoic acid and naphthalene.
A 2.8x10-4 km of a gas a pressured of 25 psi when the temperature is 45c. Explain what the volume of the gas is if the pressure is increased to 960.69 torr as well as the temperature is increased to 320 c
Is the skeleton of caffeine flat. How might the structure of caffeine account for the fact that it sublimes at atmospheric pressure instead of melting
a gas sample containing 1.50 mol at 25degc exerts a pressure of 400. torr. some gas is added to the same container and
Question- Draw the most stable conformoer of (2S,3R)-3-BROMO-2-Iodobutane in both a line drawing with wedge/hash sterochemical information and as a newman projection. Place carbon 2 in the front in the newman projection
twenty grams of a solute is added to 100g of water at 25 degrees c. the vapor pressure of pure water is 23.76mm the
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