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When blood is donated, sodium oxalate solution is used to precipitate Ca2+, which triggers clotting. A 104 mL sample of blood contains 9.7 x 10^-5 g Ca2+/mL. A technologist treats the sample with 100 ml of .1550 M Na2C2O4. Calculate [Ca2+] after the treatment. (Ksp=2.30 x 10^-9)
The solubility of KNO3 is 155 g per 100 g of water at 75 degree C and 38.0 g at 25 degree C. What mass of KNO3 will crystallize out of solution if exactly 550 g of its saturated solution at 75 degree c is cooled to 25 degree C
a)calculate the atom economy and reaction efficiency of your synthesis of isopentyl acetate. b) tell how the procedure of isopentyl acetate might be modifed to increase the reaction efficiency . c)Describe some green features of your syntheisi, an..
A helium gas cylinder at 25 Celcius is used to fill balloons and has a total volume of 43.8 L and a pressure of 1.51 x 10^4 kPa. how many moles of helium are in the tank
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 250 of a solution that has a concentration of ions of 0.700
Complete combustion of a hydrocarbon is a reaction where oxygen reacts with the compound to yield carbon dioxide and water. What is the correct balanced equation for complete combustion of CH4
what will the volume of the sample become if 459 ml of an ideal gas at 27 degrees of carbon and 1.05 atm is cooled to
Trichloroethane, C2H3Cl3, is the active ingredient in aerosols that claim to stain-proof men's ties. Trichloroethane has a vapor pressure of 100.0 mm Hg at 20.0 C and boils at 74.1 C.
a 5.0 l bulb filled with 175 torr of he and a 7.5 ml bulb filled with 325 torr of kr are connected together allowing
A sample of steam with a mass of 0.550grams and at a temperature of 100 degrees celcius condenses into an insulated container holding 4.30grams of water at 6.0 celcius
A mercury manometer is connected on one side to a bulb containing argon, while the other end is open to atmospheric pressure, which is 762 mmHg.
A student performs a series of calorimetry experiments. She determines the calorimeter constant (Ccal) for her coffee cup calorimeter. She pours a 50.0 mL sample of water at 345 K into the calorimeter containing a 50.0 mL sample of water at 298 K.
Nitrogen reacts with a metal to form a compound in which there are three atoms of the metal for each atom of nitrogen. If 1.486 g of the metal reacts with 1.000 g of nitrogen
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