is sodium hydroxide dissolving in water physical property, physical change, chemical property, or chemical change? also pls explain

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

What is the overall order of reaction for rate = k[no]2[o2]

Using data from seismic waves, geologists have learned that earth’s interior is made up of several