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How many moles of Cr(OH)3 will dissolve in 1.00 L of a solution with a pH of 4.85. (Assume the pH does not change as the Cr(OH)3 is placed in the water.) (Ksp for Cr(OH)3 is 6.7 x 10-31)
an empty flask has a mass of 123.4 grams. when the flask is filled with water, the mass is 211.6 grams. if 10 grams of zinc (density=7.14g/cm3) are added to the flask filled with water, what is the new mass of the flask?
In the titration, 34.67 mL of the sodium hydroxide solution was required to react with 0.1082 g KHP. Calculate the molarity of the sodium hydroxide.
Calculate the number of grams of KClO3 needed to make 400 mL of 0.913 M solution.
if 0.55 g of a gas dissolves in 1.0 l of water at 20.0 kPa of pressure, how much will dissolve at 110.0 kPa of pressure?
Small helium-neon lasers emit 4.62 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
Based on the following chemical equation 2C6H6 + 15O2 12CO2 + 6H2O calculate the number of moles of CO2 that will be produced
A stock solution is prepared by adding 23 mL of 1.6 M Pb(ClO3)2 to enough water to make 50 mL. How many moles of ClO3- are in 24 mL of the stock solution?
A gas-filled balloon having a volume of 2.50 L at 1.2 bar and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 10-3 atm, respectively. Calculate the final v..
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
In high spin complexes, the crystal field splitting energy is small and in low spin complexes, electrons are concentrated in the lower energy orbitals.
0.158g of a barium halide is completely precipitated out of H2SO4 and 0.124g of barium sulfate are produced. what is the true formula of the compound.
A freeway has 10,000 vehicles per hour passing a house 200 m away. Each car emits an average of 1.5 g/mi of NOx, and winds are blowing at 2 m/s across the freeway towards the house.
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