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A sample of water is to be analyzed for solids content. Ten liters (10.0 L) of water are passed through a filter initially weighing 15.0 g. After drying at 105 oC, the filter plus residual weighs 43.0 g. The filter is heated to 550 oC, and the filter plus residual then weighs 37.0 g. Another 10.0 L sample of the same water is evaporated, without filtering, yielding a residual mass of 40.0 g. This residual is heated to 550 oC and the remaining mass is reduced to 25.0 g. What are the values for TS and TDS for this water?
Which of the following is a correct neutralization reaction?
which reagent will be in excess? What will the concentration of the of the excess be?
Calculate the mass of the protein that must be dissolved in 40 mL of water to obtain this concentration
The delta G inital for the dissociation of an aqueous solution of a weak acid at 25 degrees celcius is 14.8 kJ. What is the calue of Ka for the acid?
Calculate the [NH3] and [H4Cl] in the buffer solution. Calculate the pH of the buffer solution.
Suppose that 266 mL of argon is collected over water at 25 ? C and 786 torr. Compute the volume of the dry argon at STP. The water partial pressure at 25 ? C is 23.8 torr. Answer in units of mL.
What is the molarity of a solution prepared by dissolving 10.5 grams of NaF in enough water to produce 750 mL of solution
Assume that an air conditioner consumes 1.50 X 103 W of electrical power, and that it can be idealized as a reversible Carnot refrigerator. If the coefficient of performance of this device is 2.50, how much heat can be extracted from the house in ..
Acetylene gas (C2H2) is produced as a result of the following reavtion. CaC2(s) + 2H2O(l) yield C2H2(g) +Ca(OH)2(aq)
What range of accelerating voltages would be required to cover the mass range between 16 and 625, for singly charged ions, if the field strength is held constant?
During a period of discharge of a lead-acid battery, 402g of Pb from the anode is converted into PbSO4.
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40 of water for your group
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