A train takes 3.5 h to travel from Seattle, WA to Portland, OR, a distance of 170 miles. If 0.3 h of that time is spent stopped at stations, what is the average speed of the train when it is moving? Need a Hint?
53 mi/h

58 mi/h

61 mi/h

64 mi/h

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025