During an experiment vinegar was added to baking soda. The following observations were recorded. Observation 1: The container with the reaction mixture feels cooler.
Observation 2: Gas bubbles are released.

Based on the observation, justify the type of change (physical or chemical) that took place

How many neutrons does a atom of cobalt have?

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.