Two solids and a liquid combined in a chemical change. The mass of the final mixture is lower than the mass of the starting ingredients. What happened to the missing mass?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here