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Explain what mass (g) of potassium chloride is contained in 430 ml of a potassium chloride solution that has a chloride ion concentration of 0.193 M?
A solution is made by mixing 30.0 mL of ethanol, C2H6O, and 70.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C. Ethanol density=0.789 Vapor Pressure (Torr)=43.9 Water density=0.998 Vapor Pressure (Torr)=..
A gas expands and does P-V work on the surroundings equal to 283 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system
how many grams of sucrose c12h22o11 must be added to 589 g of water to give a solution with a vapor pressure 0.933 mmhg
when 1-bromo-2-methylhexane undergoes solvoysis in methanol, four major products are formed.
If you added 75ml of a 0.555M solution of NaCl to enough water to produce 950 ml of solution, what would be the resulting molarity?
you have a 1.0cm3 sampleof lead and a 1.0cm3 sample of glass. you drop each in a separate beaker of water. how do the
bring 5ml of bromophenol blue to your work station. obtain a P20 Pipetman and record below the digits you see in the window on the side. What volume is the micropipette set to deliver
Based upon your experiences, suggest what would be the result if we heated a mixture of dichloromethane (bp 39-40 Celcius) and nappthalene (C10H8 with mp 80-82 degrees celcius and bp 218) to 60 degrees celcius
How much 1.0 mol/L HCL would you need to add to 1 L of an imaginary buffer of 0.10 mol/L to change the pH from 6.8 to 6.0. Neglect volumes and remember that HCL disassociates completely
If 75 g of liquid water (C = 4.18 J/g-oC) in a calorimeter changes temperature from 25°C to 75°C, how much heat was transferred? Use the equation C = q/mT.
25 g of gold is initially 27 degrees celsius. what's the final temperature when absorbing 2.35 kJ of heat?
A buffer is prepared by adding 3.00 g of sodium acetate (Formula Wt.=82.03g/mol) to 200 ml of 0.20 M acetic acid (Molec. Wt. = 60.053g/mol, Ka = 1.85x10-5). What will be the pH of this buffer. Assume adding the salt does not change the total volum..
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