1. The problem statement, all variables and given/known data A mercury thermometer contains 7.5 mL of mercury. If the tube of the thermometer has a cross-sectional area of 1.2 mm2, what should the spacing between the °C marks be? (The volume expansion coefficient for mercury is 1.81 x 10-4 °C−1.) 2. Relevant equations ΔV=βV0ΔT 3. The attempt at a solution I set ΔT = 1, converted the mL into mm3. I got ΔV = [5.43*(10-4)](7500)(1) = 4.0725 mm3. However, I don't know what to do with the area!