We have to determine the mass of 40Ca in the atomic mass scale in use prior to 1961.
We have the following information:
Prior to 1961
16O = 16.0000 u
40Ca = ? amu
16O = 15.9994 u
40Ca = 39.9626 u
Prior to 1961, the atomic mass unit was defined as 1/16 the mass of the atomic mass of oxygen; that is, the atomic mass of oxygen was defined as exactly 16. The atomic mass of oxygen on todays scale is 15.9994. What was the mass in atomic mass units of a 40Ca atom prior to 1961 if its mass on todays scale is 39.9626?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.