Chemistry, 19.03.2020 18:54 sierraaasifuent
How many grams of dry NH4Cl need to be added to 1.53 L of a 0.08 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.2? Kb for ammonia is 1.8×10−5. Express your answer in grams.
Answers: 2
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Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
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Chemistry, 22.06.2019 19:00
Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2
Answers: 3
How many grams of dry NH4Cl need to be added to 1.53 L of a 0.08 M solution of ammonia, NH3, to prep...
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