If you were to drill a hole into the wooden sphere, and fill it with lead, how much of the volume of wood would have to be replaced to make the whole sphere neutrally buoyant (i. e. have the same density as water)? Pb: Mass: 47.96
volume: 4.2
density: 11.3

Wooden Sphere:
mass: 79.17
vol:79.2
Density:1.00

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.