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The temperature of the mixture is 0? , and the total pressure is 1.00 atm. How many grams of helium are present in the gas mixture?
Calculate q if the temperature of a 1.00 kg water bath in the surroundings increases by 1.25 Celsius degree. Assume that the surroundings are at constant pressure.
The normal boiling point of hydroquinone is 310°C. Calculate the pressure at which hydroquinone will boil at 200°C given that its Hvap is 73.38 kJ/mol.
Given that mercury has a Hvap of 59.11 kJ/mol and its normal boiling point is 356.7°C, calculate the vapor pressure in mm Hg at room temperature, 25°C.
A 0.0587g sample of gas with an empirical formula CHF2 is placed in 154 ml flask. It has a pressure of 46.3 mmHg and 24.6 C (degrees). what is the molecular formula of the compound.
1o mL of a gaseous hydrocarbon required 50 mL of oxygen for complete combustion. If 30 mL of CO2 gas were evolved, what is the molecular formula of the hydrocarbon?
What mass of precipitate, aluminum hydroxide, forms when 185.5 mL of 0.533 M NaOH is added to 627 mL of a cake alum solution that contains 15.8 grams per liter? The other product is sodium sulfat
The analysis showed 92% CO2, 2.2% NO, 1.7%SO2 and 4.1%H2O by mass. what is the partial pressure exerted by nitric oxide (NO).
At the entracnce the average velocity is 1 m/s, the pressure 340,000 Pa, and the density is 1001 kg/m3. If the increase in internal energy is 200,000 J/kg, find the heat added to the fluid.
Although it is not an ionic solute, a 1.00-molal solution of ammonia, NH3, is actually a weak electrolyte and has an ionic strength of about 1.4 x 10^-5 molal. Explain.
Determine the total amount of heat absorbed by 100.0 grams of water at its boiling point [100 celsuis] to chang from liquid to gas.
Two moles of He gas are at 23 degrees C and a pressure of 220 kPa. If the gas is heated to 44 degrees C and its pressure reduced to 12 % of its initial value, what is the new volume?
While questioning him, you learn that he consumed two bottles of beer at lunch. Calculated the percentage of alcohol in the patient's body.
How much volume of the low acid wine do you need to mix with the 9.0 g/L TA wine to have the resulting blend equivalent to 7.2 g/L. What is the final volume of the blend?
Calculate the vapor pressure of an aqueous solution at 30 degrees C made from 100 g of sucrose (C12H22O11) and 100g of water. The vapor pressure of water at 30 degrees C is 31.8 mm Hg.
Cyclohexane has a freezing point of 6.50 C and a Kf of 20.0 C/m. What is the freezing point of a solution made by dissolving 0.771 g of biphenyl (C12H10) in 25.0 g of cyclohexane?
A solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39 C . The boiling point of pure cyclohexane is 80.70 C. Calculate Kb for cyclohexane. Express the constant numerically in degrees Celsius
A total of 0.160 g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 C the osmotic pressure produced by the solution was 0.138atm. What is the molar mass of the
A solution is prepared by dissolving 1.00 g of Compound B in enough water to create 250.0mL of solution. What is the molarity of Compound B in this solution?
An office heater puts out 2070 Btus of energy in the form of heat per hour. how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater.
The standard enthalpies for the atomization of Br2(l) and F2(g) are +112 and +79.0 kj/mol of atoms respectively, calculate the average enthalpy of the Br-F bond in BrF3.
A total area of 3.63*10^8km^2, and an average concentration of dissolved gold of 5.8*10^-9g/L. a) how many grams of gold are in the oceans? b) how many m^3 of gold are in the oceans?
The rate constant for this reaction is 2.3 x 10-3 M-1 days-1 at a given temperature. Suppose you started with 2 M of HCN(aq), what would be the molar concentration of HCN(aq) at 20 days?
The first order rate constant at a given high temperature is 5.91 x 10-3 min-1. What fraction of the original sample remains after 45 minutes?
Forty-two (42.0) grams of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?