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 molecular weight of water is thus (2Ã1.008)+(1Ã15.999)=2.016+15.999=18.015 amu. Since atomic weights are average values, molecular weights are also average values. On the average, a molecule of ordinary water weighs 18.015 amu. Both hydrogen and oxygen are made up of several isotopes.