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What pressure is exerted by 710.0 g of CH4 in a 0.940 L steel container at 170.6 K?
The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 6.40 of a 0.340 solution to the beaker. How much will the pH change? The of acetic acid is 4.760.
The half-life of U-235, an alpha emitter, is 7.1*10^8 yr.Calculate the number of alpha particles emitted by 9.1 mg of this nuclide in 8.0 minutes.
Physical propoerties and intermolecular forces, What type of intermolecular forces accounts for the following differences in each case?
What will be the average atomic mass of element A if percentage abundance of these two isotopes are 48.17 % and 51.83 % respectively. ?
A student observed the melting point of 4-methoxychalcone to be 63-70oC. Which of the following is (are) plausible explanation for this observation
a) Find Ve (the volume of HCl at equivalent point) b) Calculate the pH at Va (the volume of HCl added) =0, 1/4 Ve, Ve, and 1.1 Ve
Problem- The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
Problem- Draw Newman projections down the bond of C2 and C3 of the 2, 3-dibromo-3-phenylpropanoic acid isomers. Label Erythro and Threo.
How to prepare a buffer solution with a specific pH of 9.100 and total common ion concentration of .130 M, using a 1.0 M ammonium chloride and ammonia?
Question- The barometer for atmospheric air reads 750 mm Hg the dry bulb temperature is 30 C wet bulb temperatures is 20 C; wet bulb temperature is 20 C. Determine
calculate the radius of a chloride ion. find values reported for the ionic radii or sodium and chlorine in a refernce book, and compare them with the values you determined. is the differnece significant?
A 27.0-g sample of water at 250. K is mixed with 47.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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