Element X has three naturally occurring isotopes. The mass (amu) and % abundance of the isotopes are 37.919 amu (5.07%), 39.017 amu (15.35%), and 42.111 amu (79.58%). ... The isotopic masses and abundances are: 159.37 amu (30.60%), 162.79 amu (15. 79%), and 163.92 amu (53.61%).

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Compare and contrast the bohr model and the electron cloud models of the atom.