Two charged balloons 2.1 × 10-1 meters apart have a repulsive force of 1.3 × 10-1 newtons. the charge on one balloon is 8.2 × 10-7 coulombs. what is the charge on the other balloon? (k = 9.0 × 109 newton·meters2/coulomb2)

7.7 × 10-7 coulombs
8.2 × 10-7 coulombs
9.8 × 10-7 coulombs
7.2 × 10-8 coulombs

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.