8) Another new element, Presitigium, has two isotopes. 67.52% of the Prestigium isotopes have a mass of 256 amu. The rest of the sample is Prestigium-257. Find the average atomic mass of Prestigium.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.