According to Newton's third law, what other force must be happening?

Will a heavier bowling ball hit pins better than a lighter bsll

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

How many neutrons does plutonium -196 with an atomic number of 78.