The chart shows the movement of a ball after several seconds. a 2-column table with 4 rows. the first column labeled a has entries 0, 4, 8, 12, 16. the second column labeled b has entries 0, 2.5, 6, 8, 10.5. column a is on the x-axis, and column b is on the y-axis. which titles should replace a and b? column a should be “time,” and column b should be “position.” column a should be “position,” and column b should be “time.” column a should be “velocity,” and column b should be “speed.” column a should be “speed,” and column b should be “velocity.”

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.