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You are asked to prepare an aqueous solution of ethylene glycol (HOCH2CH2OH) with a mole fraction of 0.142.
1. If you use 555 g of water, what mass (in g) of ethylene glycol should you use?2. What is the molality of the resulting solution?
We use Use the De Broglie wavelength formula, ohr radius definition and wave-particle duality equation to compute the wavelength of,
Find the weight percent copper in the salt. Would you help me to sort out this question? A 3.026 gram portion of Cu(II) salt was dissolved in a 250 ml volumetric flask. A 25.0mL
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
if a gas 25.0 c occies 3.60 liters at pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm
A pipette is used to add 46 mL of 0.3 M Pb(NO3)2 to a 273.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8
a system conducts 192 cal of heat to the surroundings while delivering 322 cal of work. what is the change in internal energy of the system (in cal)?
A sample of gas is heated. During the heating process, the volume of the gas increases 1.7 times. If the initial temperature of the gas is 80°C, what is the final temperature of the gas.
A 125g metal block at a temperature of 93.2 degrees Celsius was immersed in 100g of water at 18.3 degrees celsius. Given the specific heat of metal (s= 0.900j/g x degrees celsius)
The Haber process is very important for agriculture because it converts N2 (g) from the atmosphere into bound nitrogen which can be taken up and used by plants. The reaction is N2 + H2->NH3
A 2.154-g sample of HgO produces 125 mL of oxygen collected over water at 24 degrees C and an atmospheric pressure of 763 mm Hg. Calculate the STP molar volume for oxygen.
magnesium undergoes a single displacement raction with hydrochlic acid. how many grams of hydrogen gas will be produced from the reaction of 3.00 g of magnesium with 4.00 g of hydrochloric acid? identify the limiting and excess reactants.
If an automobile is able to travel 224 mi on 10.0 gal of gasoline, what is the gas mileage in km/L
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