Reactant A contains 85j of chemcal energy. Reactant B contains 87.9j of chemical energy. Product C contains 38.7j of chemical energy, if the reaction absorbs 104.3j of chemical energy must product D contain?

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

the correct answer is:

a. formation of precipitation

since electrons are negative the answer is neagtaive