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A 9.11-g piece of zinc metal is dissolved in 75-mL of 3.5-M HCl and hydrogen gas is evolved. The exact amount of 5.0-M NaOH needed to neutralize the remaining H+ ions and to precipitate out the Zn2+ ions as Zn(OH)2 is then needed. Determine the mass of Zn(OH)2 precipitate formed
two compounds a and b form an ideal solution at all compositions. if the vapor pressure of pure a at 80 degrees c is
The concentration of CO2 in a soft drink bottled with a partial pressure of CO2 of 6.5 atm over the liquid at 29°C is 2.2 × 10-1 M. Determine the Henry's law constant for CO2 at this temperature.
a solution containing 10 grams of an unknown liquid and 90 grams of water has a freezing point of -3.33 degrees celcius
A patient weighs 165 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25 mg of drug per mL of solution. How many mL of the drug should the patient receive?
If you have 300.0 mL of water at 25.00 °C and add 140.0 mL of water at 95.00 °C, what is the final temperature of the mixture. Use 1.00 g/mL as the density of water.
How many gallons of ethanol can be produced per 100 tons (bone dry short ton) of dry corn stover. Assume the corn stover composition. 40% glucan, 30% xylan, 15% lignan, 10% ash. and 5% protein-others.
how a water molecule (point group C2V) would look if it was rotated C2 about each of the x, y, and z axes and if you can draw a picture. The character table would define these rotations as Rx, Ry, and Rz.
Equilibrium is established for the reaction 2X(s) + Y(g) ? 2Z(g) at 500K, Kc = 100. Determine the concentration of Z in equilibrium with 0.2 mol X and 0.50 M Y at 500K. A) 3.2 M B) 3.5 M C) 4.5 M D) 7.1 M E) None of these.
Write a balanced chemical equation for the reaction of 4-Nitrobenzaldehyde and sodium borohydride (NaBH4). If 0.21 g of 4-nitrobenzaldehyde dissolved in 10 mL of methanol is mixed with 0.14 g of sodium borohydride, what is the theoretical yield?
the most common source of copper is the mineral chalcopyrite. how many kilograms of chalcopyrite must be mined to
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
You have a dozen eggs at home, and you know that with them you can make 100 muffins. If you find that half of the eggs have gone bad and can't be used, how many muffins can you make. Express your answer as an integer.
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