<h3>
Answer:</h3>
6.25 g
<h3>
Explanation:</h3>
Concept: Half life
What is half life?
- Half life is the time taken by a radioactive substance to decay by half of its original mass.
In this case;
Half life of Plutonium-239 is 24,110 years
Original mass of plutonium-239 is 100 g
Time for the decay is 96,440 years
We are required to calculate the remaining mass;
Using the formula;
Remaining mass = Original mass × 0.5^n
where n is the number of half lives
n = Time ÷ Half life
= 96,440 yrs ÷24,110 years
= 4
Therefore;
Remaining mass = 100 g × 0.5^4
= 6.25 g
Thus, the mass of plutonium-239 that will remain after 96,440 years will be 6.25 g
Answer:
Na^+
Explanation:
The symbol for sodium is Na. The term "sodium ion" assumes that the reader knows that sodium's single 3s electron is susceptible to theft by any nearby element that has a high electron affinity. Sodium's ionization energy is low, allowing the 3s electron to move elsewhere and leave behinf a positively charged Na^+ atom.
MC₂H₄O₂ = 2 * 12 g/mol + 4 * 1 g/mol + 2 * 16 g/mol = 60 g/mol
c = 0.5 mol/L
V = 1 L
n = c * V
n = 0.5 mol/L * 1 L = 0.5 mol
m = n * M
m = 0.5 mol * 60 g/mol = 30 g/mol
answer E
(-_-(-_-)-_-)
Acetaldehyde is an organic compound (a compound containing C atoms) composed of a carbonyl group. On the other hand, a carbonyl group is a functional group containing C = O. The hybrid orbitals of a compound determines the number pi and s orbitals in the electronic configuration. For a single bond, there are two s orbitals. For double bonds, on the other hand, the number of s orbital bond is 1 while the number of pi bonds is 2. For triple bonds, there are three pi bonds present in the cloud.
Thus for a c = O bond, the atomic orbital configuration is sp3 containing 1 s orbital and 2 pi bonds.
