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A gaseous compound containing carbon as well as hydrogen was analyzed and found to consist of 83.65% carbon by mass. At 139C and 1.00 atm, the density of this compound is 2.55g/L. Define what is the molar mass?
you added 25 lambda of a mgml amino acid solution to 975 lambda of buffer. what is the concentration of the amino acid
Write a balanced combustion reaction for natural gas composed of 90 mol% methane and 10 mol% ethane. [Fractional moles are convenient for the subsequents calculations. Your reaction should have .90 mol methane and .10 mol ethane on the left side. ..
Find the amount of thermal energy produced in kilojoules when 18.9 g of water is heated from 16°C to 98.0°C.
one hundred grams of water is saturated with nh4clat 50 degrees c. according to table g if the temperature is lowered
Which reactant is in excess from the reaction of 35.0 g of hydrogen with 276 g of oxygen to form water
A solution is composed of ethanol and water. The solution density is 0.964g/mL. The partial molar volume of ethanol at this concentration is 52.0 mL/mol and water is 17.0 mL/mol. What is composition of liquid by mass
Why does the addition of NaCL to the aqeous layer sometimes help to break up an emulsion that forms in an extraction
The first ionization potential of potassium is 419 kJ/mol. If UV-?radiation with wavelength ? = 250 nm is used to eject electrons from potassium
A 0.01M solution of acid HAS, has a ka=1.6 x 10-10 and a concentration of NaAS of 1.29 x 10-3 molar; (a) what is the pH of this solution and (b) what is the pkb of the conjugate base of HAS
A solution that is 6.5x10^-2 M in potassium propionate (C2H5COOK or KC3H5O2) and 9.0x10^-2 M in propionic acid (C2H5COOH or HC3H5O2)
to what general class of mechanisms does the attack of bromide ion br- on the cyclic bromonium ion 50 bridged bomonium
The Ksp of magnesium phosphate at a given temperature is 9.78 x 10-17. Calculate the molar solubility at this temperature.
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