determine The enthalpy of vaporization in Kj/mol of C6H14 if 14.5 KJ of heat is needed to vaporize 0.500 moles of C6H14

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Which of the following units is not an official si unit? mole liter kilogram ampere