Answer: chromosomes is the answer hope this helps
Explanation:
Answer:
C) [PCl5] = 0.0280 M, [PCl3] = 0.222 M, [Cl2] = 0.222 M
Explanation:
Moles of [PCl₅] = 0.250 M
Considering the ICE table for the equilibrium as:
PCl₅ (g) ⇔ PCl₃ (g) + Cl₂ (g)
t = o 0.250
t = eq -x x x
---------------------------------------------
--------------------------
Moles at eq: 0.250-x x x
The expression for the equilibrium constant is:
So,
x = 0.222 M
Equilibrium concentrations :
[PCl₃] = [Cl₂] = 0.222 M
[PCl₅] = 0.250 - 0.222 = 0.280 M
<u>Option C is correct.</u>
Answer:
B. 20, 22, 20
Explanation:
The atomic number (Z) of calcium is 20, that is, it has 20 protons.
The mass number (A) of calcium-42 is 42. The mass number is equal to the sum of protons and neutrons. Then,
p⁺ + n⁰ = 42
n⁰ = 42 - p⁺
n⁰ = 42 - 20
n⁰ = 22
Since calcium is electrically neutral, it has the same number of protons (+) and electrons (-). Then, calcium has 20 electrons.
In case you're in hurry:
Ans: 26 valence electrons
Explanation:To find the valence electrons, we need to add the valence electrons of the individual atom in the compound. Therefore, let us divide this question into 3 parts.
1) What is the number of valence electrons of Arsenic (As)?
2) What is the number of valence electrons of Oxygen (O)?
3) What is the total number of valence electrons of
1.
The number of valence electrons of Arsenic(As) = 5
2.
The number of valence electrons of Oxygen (O) = 6
3.
Since there are 3 atoms of Oxygen, and 3 extra electrons are also present in the shape of "3-", as it is an ion, therefore,
The total number of valence electrons of
= 5 + 6 * 3 + 3 =
26 valence electrons.
Ans: The total number of valence electrons in = 26.
-i