Answer:
33.8km/h
Explanation:
average speed=dostance traveled/time
200/21.3=9.39 m/s
1m/s=3.6km/h
33.8km/h
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The answer is (3) 3.0. The solution with a pH of 2.0 has greater concentration means the other solution has greater pH. pH=-lg[H+]. So we can get the pH of other solution is 3.