Question 10 a chemistry student adds a quantity of an unknown solid compound x to 150. ml of distilled water at 26.° c. after 10 minutes of stirring, all of the x has dissolved. the student then drains off the solution and evaporates the water under vacuum. a precipitate is left behind. the student washes, dries and weighs the precipitate. it weighs 3.45 g .

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.