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The solubility of KNO3 is 155g per 100g of water at 75 degrees C and 38.0g at 25degrees C. What mass in grams of KNO3 will crystalize out of solution if exactly 100g of it's saturated solution at 75 degrees C is cooled to 25 degrees C?
How many milliliters of boiling water are required to dissolve 24 g of N-Bromosuccinimide? If the solution were cooled to 25° C, how many grams of N-Bromosuccinimide would crystallize out.
Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes
62.8 mL of air is collected over water at 24 degrees celsius and 733 mm Hg pressure. find the volume of the dry air at STP
Either bulb will be used for 2,000 hours per year at an electricity cost of $0.14/kwh (kilowatt-hour). If the interest rate is 6%, which bulb is more cost effective over 8,000 hours of use based upon a comparision of Net Present Values?
25 g of a certain metal is heated in boiling water and then poured into 90 mL of water initially at 22.0oC. After the water has resumed a constant temperature.
what is the pH of the resulting solution ? (Assume that the volume change does not change upon adding hydroiodic acid) Hypochlorous acid HClO Ka1=3.5x10-8
A saturated solution of CaF2 had a calcium ion concentration of 2.20 x 10^-4 M. What is the Ksp for CaF2?
Calculate the heat absorbed by 15.0 g of water to raise its temperature from 20.0oC to 50.0oC at constant pressure. The specific heat of water is 4.18 J/g.oC
A gasous mixture of O2 and Kr has a density of 1.104 grams per liter at 435 torr and 300 K. What's the mole percent of O2 in the mixture?
Determine the center temperature of the product afer 60 minutes if the convective heat transfer coefficient between the product and mbient air is 25 W/m^2 K.
If 3.50 g of H2S are used in the above reaction, what will be the theoretical yield of water in grams?
Small helium-neon lasers emit 1.51 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
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