Answer:
Metallic.
Explanation:
Hello,
In this case, when nickel and tin bond, the difference in their electronegativities results:
Such difference, in addition to the fact that nickel is a transition metal and tin a metal, will suggest that the predominant type of bond for this substance is metallic as the attractive force between the conduction of electrons and positively charged metal ions is present.
Best regards.
Answer:
the amount present 8 hours ago is Ao = 93.338 g
Explanation:
the radioactive decay is given by
A = Ao * 2^(- t/T)
where T = half-life of the substance , t= time , A= amount of substance at time t , Ao= amount of substance at time 0
therefore at t=8 hours , A=16.5 gr
Ao = A*2^(t/T) = 16.5 g * 2^(8 hours/3.20 hours) = 93.338 g
Ao = 93.338 g
Answer:
5.8μg
Explanation:
According to the rate or decay law:
N/N₀ = exp(-λt)------------------------------- (1)
Where N = Current quantity, μg
N₀ = Original quantity, μg
λ= Decay constant day⁻¹
t = time in days
Since the half life is 4.5 days, we can calculate the λ from (1) by substituting N/N₀ = 0.5
0.5 = exp (-4.5λ)
ln 0.5 = -4.5λ
-0.6931 = -4.5λ
λ = -0.6931 /-4.5
=0.1540 day⁻¹
Substituting into (1) we have :
N/N₀ = exp(-0.154t)----------------------------- (2)
To receive 5.0 μg of the nuclide with a delivery time of 24 hours or 1 day:
N = 5.0 μg
N₀ = Unknown
t = 1 day
Substituting into (2) we have
[5/N₀] = exp (-0.154 x 1)
5/N₀ = 0.8572
N₀ = 5/0.8572
= 5.8329μg
≈ 5.8μg
The Chemist must order 5.8μg of 47-CaCO3
Answer:
they are transfer from the towers
Explanation:
Answer:
it's a physical change
Explanation:
there there was no burning it was grabbing and just cutting
