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the specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 C to 40.5 C ?
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
a solution is prepared by adding enough water to 387 g of CsCl to form 1 liter of solution. What is the mass of the solution? the density of the solution is 1.384 g/mL.
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8)
Finding Number of Atoms in a Molecule from Molecular Weight, As determined from the gas law, the molecular weight of a substance is eight times the atomic weight
an aqueous CaCl2 solution has a vapor pressure of 81.1 mmHg at 50 C. The vapor pressure of pure water at this temperature is 92.6 mmHg.
Calculate Q,W and delta U for the conversion of 1 mole of liquid water to steam at T = 100C and P = 1 atm. The heat of vaporization of water is 9720 cal/mol.
A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
What is the purpose of Sodium phosphate dibasic when used to make ethanol via fermentation?
How many grams of Mg2SO4 is required to make up 100mL of 20g/L Mg2SO4 solution in water?
A 1.20-L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8) (b) 0.115 M HONH3Cl
Large quantity of ammonia are burned in the presence of platinum catalyst to give nitric oxide as d first step in the preparation of nitric acid.
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