Given that 12C12000000 DalH 1007825 Da 2014102 Da 18C1300335

Given that: 12C=12.000000 DalH= 1.007825 Da -2.014102 Da 18C-13.003355 Da a) % hat is the nominal mass of 13CH,? b) What is the exact mass of 12C1H4? c) What is the mass number for (12C1H3H)2\"?

Solution

1. Nominal mass is the mass from formula= 13 + 4 = 17g

2. Exact mass = 12.000000 + 4× 1.007825 = 16.031300 g

3. Mass number= 12+1×3+2 = 17