need help with 4 but also 2

2. There exists an element my daughter calls dumbumium. It has an atomic mass of 76.5432amu. It has two isotopes, one with an atomic mass of 75.7789 amu and the other has an atomic mass of 76.7692amu. What are the abundances of the two isotopes? 3. Scientists at IBM used a particular method of scanning tunneling microscopy to place xenon atoms in positions that led to the image below; each bump represents a single xenon atom. What is the mass of xenon atnme lin numal th the image below? Xe35amv131.2935131.29/6.0221023 4. The mass of the average boysenberry is 0.28 ounces. The average Tesla weighs 4900lbs. If one were to assemble one mole of boysenberries, how many Teslas would you need to have a Tesla pile of the same weight? 5. A 7.83 gram sample of a compound made of hydrogen, carbon, and nitrogen is found to contain 0.290g hydrogen and 4.06g nitrogen. How much carbon is there in a 3.37g sample of this same compound? 6. An alpha particle (4He2+) has a mass of 4.00151 amu. What is the charge-to-mass ratio of an alpha particle in Coulombs per grams? 7. Nuclei with the same number of neutrons but different mass numbers are called isotones. Write the symbols of four possible isotones of 185W