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Chlorine has two isotopes, Cl-35 and Cl-37. Their abundances are 75.53% and 24.47%, respectively. Assume that the only hydrogen isotope present is H-1.a. How many different HCl molecules are possible?B. What is the sum of the mass numbers of the two atoms in each molecule?C. Sketch the mass spectrum for HCl if all the positive ions are obtained by removing a single electron from an HCl molecule.
machine a waspurchasedthreeyearsago for 10000 and had an estimated market valueof 1200 at the end ofits 10-year life.
a person ate 0.144 pound of cheese an energy intake of 1150 kj. suppose that none of the energy was stored in his body.
Suppose that 1.08 g of rubbing alcohol (C3H8O) evaporates from a 75.0 g aluminum block.If the aluminum block is initially at 25 C, what is the final temperature of the block
What is the volume of sulfur dioxide (SO2 gas), formed when 2 moles of carbon disulfide (CS2) are burned ?
find the normal boiling point of a saturated solution of lif at 100c assuming it un- dergoes complete dissociation. the
disubstituted alkene was formed in which the olefinic protons exhibited a vicinal coupling of 9.0Hz in the H NMR. What is the stereochemistry
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution? The Kb of ammonia is 1.8 x 10-5.
In the purification process, the organic layer is washed with 2 M NaOH and then with water. What is the purpose of these washes
Solution is prepared by dissolving 276 g of sucrose (C H O olution is prepared by dissolving 276 g of sucrose (C 12 H 22 O 11) in 624 g of water. What is the vapor pressure of this solution
Calculate the mass of Cu(NO3)2·3H2O needed to prepare 50.0mL of a 0.50 M Cu(II) solution?
How many grams of formic acid, HCOOH, must be added to 0.240 L of 0.110 M sodium formate, HCOONa, to yield a buffer solution with a pH of 3.50. Assume no volume change. Ka of HCOOH = 5.0 10-4
an automobile radiator holds 4 gal of a 10 antifreeze-water mixture. the of antifreeze should be raised to twenty five
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