Element X has 2 naturally occurring isotopes. The first isotope has an atomic mass of 44.009 amu and it’s percent abundance is 33%. The second isotope has an atomic mass of 40.5 amu and it’s percent abundance is 67%. What is the atomic mass of Element X A 39.99 amu
B 39.91 amu
C 40.42 amu
D 41.66 amu

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution