What is the mass number for an atom that has 36 protons 36 electrons and 40 neutrons

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?