Chemistry, 25.02.2020 22:32 sierravick123owr441
Two 250 ml samples of water are drawn from a deep well bored into a large underground salt (NaCl) deposit.
Sample #1 is from the top of the well, and is initially at 42 °C.
Sample #2 is from a depth of 150 m, and is initially at 8 °C. Both samples are allowed to come to room temperature () and pressure. An NaCl precipitate is seen to form in Sample #1.
a. A bigger mass of NaCl precipitate will form in Sample #2.
b. A smaller mass of NaCl precipitate will form in Sample #2.
c. The same mass of NaCl precipitate will form in Sample #2.
d. No precipitate will form in Sample #2.
e. I need more information to predict whether and how much precipitate will form in Sample #2.
Answers: 2
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For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)
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Two 250 ml samples of water are drawn from a deep well bored into a large underground salt (NaCl) de...
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