Renew by Mail. You can renew your passport by mail with application DS-82 if you meet the criteria listed on the U.S. Department of State web site. Renew by Mail Checklist. You can also renew your passport by bringing your prepared renewal application to a Post Officeâ¢ location.enew by Mail. You can renew your passport by mail with application DS-82 if you meet the criteria listed on the U.S. Department of State web site. Renew by Mail Checklist. You can also renew your passport by bringing your prepared renewal application to a Post Officeâ¢ location.
Solution: 12/6.022*10^23 = 1.9927*10^-23. We know that carbon 12 has a mass of 12 a.m.u and 1 amu =1.66*10^-24 grams.
The current system of atomic masses was instituted in 1961 and is based on the mass of 12 C (read carbon twelve). By definition the atomic mass of a single 12 C atom is exactly 12 atomic mass units (denoted by the abbreviation amu or u).The masses of all other elements are based on this standard.y definition the atomic mass of a single 12 C atom is exactly 12 atomic mass units (denoted by the abbreviation amu or u). The masses of all other elements are based on this standard.