Answer:
11.33g of hydrogen
Explanation:
We need to apply the formulae;
Nt/No= (1/2)^t/t1/2
Where;
Nt= mass of hydrogen remaining after a time t (the unknown)
No= mass of hydrogen initially present = 2900g
t= time taken for Nt mass of hydrogen to remain = 19600 years
t1/2= half-life of hydrogen= 2450 years
Substituting values;
Nt/2900= (1/2)^19600/2450
Nt/2900= (1/2)^8
Nt/2900= 1/256
256Nt= 2900
Nt= 2900/256
Nt= 11.33g of hydrogen
Therefore, 11.33g of hydrogen is left after 19600years.
