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15.0 moles of gas are in a 5.00L tank at 22.2°C . Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2
What volume (in mL) of 0.0032 M Na2Cr2O7 would be required to titrate a 20 mL aliquot of water with COD of 720 ppm? The formula is volume (Na2Cr2O7) = Moles(Na2Cr2O7)/[(Na2Cr2O7]. how to obtai
A sample of ideal gas at room temperature occupies a volume of 38.0L L at a pressure of 792torr torr . If the pressure changes to 3960torr torr , with no change in the temperature or moles of gas, w
2.00 ml of a 0.75 m solution of potassium permangante k2mnO4 solution is used to make a 500.00 ml solution. What is the concentration go the new solution.
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone How much limestone in kilograms would be required to completely neutralize a lake containing of H2 per lit
if a gas held at constant pressure had an initial volume of 5.00 L and the temperature changed from 35 degrees C to 578 K what would be the final volume of this gas.
A solution of potassium hydroxide of unknown concentration is used to titrate 15.0 mL of a 2.5 M sulfuric acid solution. The volume of the base needed is 27.2 mL. What is the molarity of the base?
a sample of helium gas is at 122 kpa and 22 C. assuming constant volume, what will the temperature be when the pressure is 203 kpa .
The pH of a solution made by dissolving 1.0 mole of propanoic acid and 1.0 mol of sodium propanoate in 1.0 L water is 4.85.
Determine the molar mass of an unknown gas that has a volume of 72.5 mL at a temperature of 68°C, a pressure of 0.980 atm, and a mass of 0.207 g.
A centrifugal pump is to be used to extract water from a condenser in which the vaccum is 640 mm of mercury. At rated discharge, the net positive suction head must be at least 3m above the cavitatio
A 4.60% solution by mass of an enzyme in water has an osmotic pressure of 23.0 torr at 289 K. Calculate the molar mass of this enzyme. (Assume that the density of the solution is 1.00 g/mL.)
A 0.600 g sample of a nonvolatile yellow crystalline solid is dissolved in 24.6 g of benzene, producing a solution that freezes at 4.81oC. Find the molar mass of the yellow solid in g/mol.
A 1.00-g sample of a metal M (that is known to form M2+ ions) was added to 0.100 L of 0.500 M H2SO4. After all the metal reacted with some of the acid, the remaining acid required 0.0334 L of 0.500
A 7.50-L container holds a mixture of two gases at 33 °C. The partial pressures of gas A and gas B, respectively, are 0.227 atm and 0.852 atm. If 0.220 mol of a third gas is added with no change
Two gases, A and B, are mixed together. If 3.50 mol of A is mixed with 0.750 mol of B and the final pressure of the mixture is 3.25 atm, what are the partial pressures of A and B?
A buffer solution is prepared by dissolving 3.13 mol of HCN (Ka = 4.0 x 10-10) and 4.32 mol of KCN in enough water to make 3.42 L of solution. What is the pH of this solution?
Ethylene glycol (C2H6O2) is used as an antifreeze in cars. If 400 g of ethylene glycol is added to 4.00 kg of water, what is the molality? Calculate how much the freezing point of water will b
A solution is made by dissolving 3.14 g of NaCl in 79.9mL of water. what is the concentration of sodium chloride in units of weight/volume percent?
a saline soluton used in intravenous drips for patients who cannot take oral fluids contains 0.92% (W/V) NaCl in water . How many grams of NaCl are contained in 729ml of this soution.
A container with 644 mL of oxygen gas is at a pressure of 11.6 kPa. What pressure would be required to decrease the volume of the gas to 439 mL, assuming no temperature change?
what is the concentration(M) of CH3OH in a solution prepared by dissolving 16.8 g of CH3OH in sufficient water to give exactly 230 mL of solution.
The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d 5.72 g/cm3) that is 3.00 cm on edge is allowed to react with 1.01 1024
what is the pressure in torr that a 44.0g sample of carbon dioxide gas will excert at a temperature of 46.2 degrees celsuis when it occupies a volume of 5 L.
Every 100.00 g of the compound SiH4 contains 87.45 g of Si and 12.55 g of H. Find the ratio of the atomic mass of S to the atomic mass of H.