Answer:
62.50
Explanation:
I divided the 125 in the result is 62.50 but it is considered a 62.
never mine:)
The mass number of aluminium hydroxide is 78 thus, the number of moles in 0.745 g is:
no. of moles= mass/ RFM
= 0.745/78
=0.00955moles
Therefore the 0.00955 moles should be in the 35.18 ml
therefore 1000ml of the solution will have:
(0.00955ml×1000ml)/35.18
=0.2715moles
The solution will be 0.27M hydrochloric acid
Because 25% is half of 0.5 and the half life of 
is given as 5,715, the time it takes to reach this amount should just be double the half life: 11430 years.
However, in other cases the problem may not have easy numbers, so below is a more mathematical approach.
The half life formula is 
.
Solving for t gives:
Given information:
Plug in given values and solve for t.
With correct significant figures, this would be 11000 years.
Answer:
gibberish
Explanation:
its literaly nothing _#_$&_θГ[§θμθ_(;!&#\=&.·&:ГГ:¬¬&μ!¬´€
A metal that would be magnetic is nickel
