Why is dissolving salt in water is a physical change? me

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

1. list the number of drops of titrant needed to produce a color change for sample a and sample b. list the actual volume of titrant needed to produce a color change for sample a and sample b.