Which model below represents a pure substance?

question 1 options:

neither figure 1 nor figure 2 are pure substances.

figure 1, because it is a compound.

both figure 1 and figure 2 are pure substances.

figure 2, because it is a compound

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative