A balloon containing 2.6 mol hydrogen has a volume of 3.9 L. More hydrogen is added to the balloon, giving it a volume of 17.1 L. How many moles of hydrogen were added?

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.