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Calculate the final temperature of 36 {rm mL} of ethanol initially at 16^circ {rm C} upon absorption of 750 {rm J} of heat. (density of ethanol =0.789 {rm g}/{rm mL})
If the pressure is lowered to 1.00 atmosphere and the temperature is raised to 400 K, the volume of the gas sample would be?
The heat of fusion of water is 6.008x10^3 J/mol at its normal melting point of 272.15K. Calculate the freezing point depression constant Kf.
A flask containing 352 ml of gaseous nitrogen is collected over water at a temperature of 22 degree Celsius. the total pressure of the gases was 742 mm Hg. how many grams of nitrogen were collected?
A gas mixture with a total pressure of 770 contains each of the following gases at the indicated partial pressures: , 257 ; , 114 ; and , 177 . The mixture also contains helium gas. What is the par
What is the ground-state electron configuration of Co3+?
Ammonia and hydrazine are both compounds of nitrogen and hydrogen.Based on the law of multiple proportions, how many grams of hydrogen would you expect 3.47 of nitrogen to combine with to yield amm
Because of the slightly solubility, 0.59mg/L. of Ba3(PO4)2 all of the Ba2- and (PO4)3- do not precipitate from solution. How many milligrams and moles of Ba3(PO4)2 dissolve in 200mL of solution?
What metals give rise to the best plasmons? why?Why are plasmonic better than electronics for comptational processes?Why is it difficult to couple to a plasmon?
Calculate the mass percent of a solution in which 176 of is dissolved in 3.08 of water at 25 (density = 0.997 ).
Calculate the theoretical yield of C2H5CI when 125g of C2H6react with 255 g of CI2, assuming that C2H6 and CI2 reactonly form C2H5CI and HCI.
Calculate the freezing point depression, the ratio of the vapor pressure above the solution to that of the pure solvent, and the molecular weight of the solute, Pbenzene=103 Torr at 298K.
What is the density of a block of marble that occupies 253 cm3 and has a mass of 752 g?
A physician wrote a prescription for Tylenol 325 mg/5mL with codeine 10 mg/5mL, 5mL three times a day for 4 days as needed for cough. How much Tylenol in milligrams is contained in a teaspoonful?
A calorimeter contains 150g of water at 65 C. 45f of 5 C is added to the calorimeter and the mixture's temperature stabilizes. what is the final temperature?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 57.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this
Hydrofluoric acid (HF) has a Ka value of 7.2 × 10¯ 4. 0.250 mol of F¯ ions (in the form of NaF) are added to 1.00 L of 0.100 mol L¯ 1 aqueous HF. Calculate the res
what volume of ethylene glycol, a nonelectrolyte, must be added to 15.0 Liters of water to produce an antifreeze solution with a freezing point of - 30 degrees celcius?
Calculate the heat of reaction in kJ. SiO2(s) + 4 HF(g) SiF4(g) + 2 H2O(l)
You have 1005.3 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of solvent are in the solution?
The critical point of NH3 is 132°C and 111 atm, and the critical point of N2 is -147°C and 34 atm. Which of these substances cannot be liquefied at room temperature no matter how much press
Assume you dissolve 2.56g of malic acid, C4H6O5 in half a liter of water (500g). Calculate the molarity, molality, mole fraction, and weight percentage of acid in the solution.
The volume of a sample of a gas at 273 degrees Celsius is 200.0 L. if the volume is decreased to 100.0 L at constant temperature, what will be the new temperature of gas?
A solution of ammonia and water contains 2.00×10^25 water molecules and 5.30×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
A tank with a volume of 1.00M3 is filled with air at 0 degrees to 20 times its atmospheric pressure. How much volume will occupy at 1 atom and room temp?