An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Use the periodic table to find the molar mass of each element. molar mass h = g/mol molar mass s = g/mol molar mass o = g/mol

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.