Question

task 10:
if a graphs y - axis is labeled concentration (mol/l) and the x - axis is labeled time (min),
what type of change is being studied?
a) change in temperature over time
b) change in concentration over time
c) change in volume with pressure
d) change in mass during reaction
task 11:
what does a downward - sloping line on a concentration - time graph indicate?
a) concentration is increasing
b) concentration is decreasing

Explanation:

Pour Task 10, le y - axe est "Concentration" et l'x - axe est "Temps", donc on étudie la variation de la concentration au fil du temps. Pour Task 11, dans un graphique concentration - temps, une pente négative (droite descendant) signifie que la concentration diminue avec le temps.

Answer:

Task 10: B. Change in concentration over time
Task 11: B. Concentration is decreasing