The answer is 6,2729.10e+26 carbon atoms.
9 half lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14.
125
its 125
The general formula of linear alkanes is CnH2n+2. If an alkane with 125 carbons exist (I don't know) the chemical formula will be C125H252 and the name pentacosehectane.
There are 58.6934 gram in one mole of Ni atoms, so there are125(g Ni) / 58.6934 (g.mol-1 Ni) = 2.13 moles in 125 gram Ni
9 half lives have elapsed to yield a sample with 125 atoms of C-14 and 375 atoms of N-14.
We have now way of knowing unless we know the initial number of C-14
125
its 125
The general formula of linear alkanes is CnH2n+2. If an alkane with 125 carbons exist (I don't know) the chemical formula will be C125H252 and the name pentacosehectane.
There are 58.6934 gram in one mole of Ni atoms, so there are125(g Ni) / 58.6934 (g.mol-1 Ni) = 2.13 moles in 125 gram Ni
125
We are as backward as 125 years ago.
1.6 g/ml
125
contains the same number of molecules
125