Answer:- 23.0 mg
Solution:- Radioactive decay obeys first order kinetics and the first order kinetics equation is:
where, 
is the initial amount of radioactive substance and N is it's amount after time t. k is the decay constant.
From given information, Original amount, of the radioactive substance is 184 mg and we are asked to calculate the amount N after 15 days. It means, t = 15 days
Half life is given as 5 days. From the half life, we could calculate the decay constant k using the equation:
where, 
is the symbol for half life. let's plug in the value of half like to calculate k:
Let's plug in the values in the first order kinetics equation and solve it for N:
lnN = 3.136
N = 23.0 mg
So, 23.0 mg of Bi-210 would be remaining after 15 days.
Answer:
Sulfur reacts with oxygen to form sulfur dioxide. When nonmetals reactwith one another, the product is a molecular compound. Often, the nonmetal reactants can combine in different ratios and produce different products. Sulfur can also combine with oxygen to produce sulfur trioxide.
Vinegar and tea. hope this helps
Answer:
Time=345.7 min
Explanation:
It is an example for Faraday's first law of Electrolysis
It states that the amount of substance deposited is directly proportional to the amount of electricity passed.
W=Zit
Z=E/96500
W= E it/96500
And E=58.7(molar mass of Ni)/2(charge on Ni)=29.3
t=W96500/E i
= 29.6x96500/29.3x4.7
= 20742.1 sec
=345.7 min
Answer: A light bulb in the same room at the same temperature.
Explanation: Yw, BYE!!!
