What is the molecular formula of tear?

It's a solution , mostly consisting of water and some other wastes ( Extra salts in the body etc.) . A Molecular Formula exists for a pure substance . Tear is a mixture . But u could say it's components are H20 , Na,Mg,K,Ca cations and such ..

yes, water is wet, just as it makes other things wet, it is wet itself, kinda like ice, when ice is in water, the ice makes water cold, and ice is cold, therefore with that example, water is wet

the product of the pressure and volume is also constant