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when 0.800 grams of NaOH is dissolved in 100.0 grams of water, the temperature of the solution increases from 25.00 degree to 27.06 degree . what is the amount of heat absorbed by the water . ( the
What mass of natural gas {rm{(CH}}_4 ) must you burn to emit 259 kJ of heat?
Write a balanced equation for the reaction of rm Ni(NO_3)_2 and NaOH. Express your answer as a chemical equation. Identify all of the phases in your answer. If there is no reaction, enter noreaction
A salt bridge connects the two beakers, and wires to a voltmeter link the two metal electrodes. Write the equation for the overall cell reaction.
At 20 degrees C, the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. What is the vapor pressure at 20 degrees C of a solution by mixing 27.0 g of methanol and 75.
The helicopter is moving horizontally to the right at a constant velocity. The weight of the helicopter is W=56500N. The lift force L generated by the rotating blade makes an angle of 21.0 degrees w
A solution of phosphoric acid was made by dissolving 10.0g H2PO4 in 10.0 mL of water. The resulting volume was 104 mL. Calculate density, mole fraction, molarity, and molality of the solution. Assu
What is the pressure in a gas container that is connected to an open end u tube manometer if the pressure of the atmosphere is 742 torr a
Given that the ph for acetic acid is 2.41, the ka=1.8X10-5 and assuming the density of vinegar to be 1.00g/cm3, what is the percent dissociation for acetic acid in vinegar?
Which of the following aqueous solutions will have the lowest osmotic pressure?
What is the freezing point of a solution made by dissolving 352g of ethylene glycol c2h6o2 on 648g of water the freezing point of pure water is 0.0c and kf of pure water is -1.86Cm?
Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it cools from 89.2°C to 15.7°C
When a 7.00-g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of 2.734 kJ·K-1, the temperature decreases by 0.460 K. Calculate the molar heat of solution
A basketball is inflated to a pressure of 1.50 atm in a 20.0C garage. What is the pressure of the basketball outside where the temperature is -5.00C?
If oxygen gas were collected over water at 295K and the total pressure of the wet gas were 710 mm Hg, what would be the partial pressure of the oxygen?
A 1.630 g sample of naphthalene, C10H8(s), is completely burned in a bomb calorimeter assembly and a temperature increase of 8.44°C is noted.
Calculate the pH of a solution made by adding 77 g of sodium acetate, NaCH3COO, to 24 g of acetic acid, CH3COOH, and dissolving in water to make 700. mL of solution. Hint given in feedback.
What is the product formed from the reaction of benzaldehyde and sodium borohydride?
Hydrocortisone valerate is an ingredient in hydrocortisone cream, prescribed for skin problems. Its empirical formula is C26H38O6. What is the percent by mass of carbon in hydrocortisone valerate?
Construct the corresponding motion graphs taking the acceleration due to gravity as 10 . Ignore air resistance. In all three motion graphs, the unit of time is in seconds and the unit of displacemen
What is the compound name race for copper(IV) acetate
A wine contains 11.2% (v/v) ethanol. What volume of ethanol is in a 750.-mL bottle of this wine?
Calculate the percentage of alcohol in the patient's body. Identify the substance produced in the liver that helps catalyze this reaction.
A truck is towing a 1000-kg car at constant speed up a hill that makes an angle of α = 5.0 with respect to the horizontal. A rope is attached from the truck to the car at an angle of β =
A solution is prepared by dissolving 14.4 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 11.50 mL sample of this stock solution is added to 55.00 mL of water. Calculate the