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Determine the magnesium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0481 M EDTA, 12.78 mL were used when an aliquot of the sample was at pH 13.0, 17.27 mL were used for an aliquot at pH 10.5. Show work
Gallium consists of two isotopes of masses 68.95 amu and 70.95 amu with abundances of 60.16% and 39.84%.
In a reaction mixture at equilibrium, the partial pressure of NO is 119 torr and that of Br2 is 175 torr. What is the partial pressure of NOBr in this mixture? Kp=28.4 at 298 K.
What concentration of aqueous NaCl solution freezes at -15.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
According to the given data propylamine (CH3CH2CH2NH2) boils at 49 degrees C, Trimethylamine [(CH3)3N] boils at 3 degrees C;trimethylamine has reasonably high solubility in water Propylamine is entirely miscible with water; considering that isobu..
Assume that liquid water forms item 5. Write a formula equation for the reaction that shows the physical states of all compounds?
Calculate q,w,delta U and Delta H for each segment and for the cycle in which the direction of each process is reversed. In the graph all it says is the P initial =16.6 bar and Vinitial=1.00L and P final=16.6 bar and V final =25L
Sodium atoms emit light with a wavelength of 330 nm when an electron moves from a 4 p orbital to a 3 s orbital. What is the energy difference between the orbitals in kilojoules per mole?
a metal sample weighing 45.0 grams and at a temperature of 99.1 degrees Celsius was placed in 38.6 grams of water in a calorimeter at 25.0 degrees Celsius. The calorimeter reached a maximum temperature of 32.8 degrees Celsius.
a solution contains 55 grams of ascorbic acid in 250 g of water freezes at -2.34 degrees C. calculate the molar mass of the solute
A half-cell, made by dipping a silver wire into 0.05 M aqueous AgNO, at 298 OK, develops a half-cell potential of +0.740 volts. What is the standard half-cell (Eo) for silver?
The percentage natural abundances of 39k and 41k are 93.2581% and 6.7302%, respectively. find out the isotopic mass of 41k.?
Determine how much heat (in kJ) is needed to warm 12.0g of ice, that is initially at -10.0 ° C, to steam at 114.0 ° C? The heat capacity of ice is 2.09 J/g⋅ ° C and that of steam is 2.01 J/g⋅ ° C.
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