Is amu= gram/mole?

In other words, the ratio of amu/atom is the same as the ratio of g/mol. The definitions of amu and moles were intentionally chosen to make that happen (I'm surprised your teacher didn't explain this, actually). This allows us to easily relate masses at the atomic scale to masses at the macroscopic scale. read more

Atomic mass units (AMU) and moles are two ways of measuring an atom or other particle. AMU is essentially a measurement of the weight of a single proton or neutron. A mole, on the other hand, is a very specific number of particles: 6.022045 x 10^23. read more

For any element, its atomic mass in AMU is equal to the weight of 1 mole of the element in grams. For example, all natural isotopes of oxygen collectively have an atomic mass of 15.999 AMU, so one mole of oxygen weighs exactly 15.999 grams. read more