Question

Two naturally occurring isotopes exist for the hypothetical element dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent a relative mass of 21.3 amu. What is the atomic mass of dippium?
Please show the work

thanks

Answer 1

17(0.25) + 21.3(0.75) = ?

Answer 2

44.7