Answer:Explanation:
In compounds, all other atoms are assigned an oxidation number so that the sum of the oxidation numbers on all the atoms in the species equals the charge on the species.
Answer:
30
Explanation:
Just trust me
Answer:b
Explanation:sorry if I’m wrong
half lives passed=5
given sample=90g
sample left=2.8125g
no. of half lives=total time/half life
no.=19days/3.8days
no.=5 days
after 5 half lives sample left=2.8125g