8 A small quantity of hydrochloric acid was added to a large quantity of marble chips in an evaporating dish, which was placed on the pan of a balance. The mass of the dish and its contents was recorded every half minute. The results are shown in the graph below. 25.1 25.0 24.9 24.8 24.7- 24.6+ 0. 1 3 4 Time / minutes a Explain why the curve slopes down. b Which result would seem to be incorect? Why? What was the mass of the evaporating dish and its contents (i) at the start and (ii) at the end of the experiment? Mass of dish and contents/ grams
8 A small quantity of hydrochloric acid was added to a large quantity of marble chips in an evaporating dish, which was placed on the pan of a balance. The mass of the dish and its contents was recorded every half minute. The results are shown in the graph below. 25.1 25.0 24.9 24.8 24.7- 24.6+ 0. 1 3 4 Time / minutes a Explain why the curve slopes down. b Which result would seem to be incorect? Why? What was the mass of the evaporating dish and its contents (i) at the start and (ii) at the end of the experiment? Mass of dish and contents/ grams
Chapter3: Statistical Tests With Excel
Section: Chapter Questions
Problem 1P
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