Answer:
Sulfuric acid is a strong acid in any state
Explanation:
You may be thinking if the definition that a weak acid produces relatively few ions in aqueous solution,
If you have 100 % sulfuric acid, there is no water, so the definition does not apply.
Commercial sulfuric acid contains about 2 % water. The sulfuric acid in that small amount of water consists of about 99 % HSO₄⁻ and 1 % SO₄²⁻. The acid is almost completely ionized.
Sulfuric acid is a strong acid.
<u>Answer:</u> The molar mass of molecule X is 162.5 g/mol
<u>Explanation:</u>
We are given:
0.9 % of NaCl
This means that 0.9 grams of NaCl is present in 100 grams of solution
5 % of molecule X
This means that 5 grams of molecule X is present in 100 grams of solution
To calculate the concentration of solute, we use the equation for osmotic pressure, which is:
Or,
where,
i = Van't hoff factor
R = Gas constant =
T = temperature of the solution
According to the question:
Osmotic pressure of both the solutions are same.
So, the equation becomes:
where,
Putting values in above equation, we get:
Hence, the molar mass of molecule X is 162.5 g/mol
Answer:
esta con's para 15, tu the diamatera' la 24 equlia 5<4 ponte 50
Explanation:
Given :
Mass of Ba(OH)₂ , m = 35.5 g.
Volume of mixture, V = 325 mL = 0.325 L.
To Find :
The molarity of a solution.
Solution :
We know, molarity of a solution is given by :
We know, molecular mass of Ba(OH)₂ is given by :
M.M. = 171 g/mol
Putting all these values in given equation, we get :
Hence, this is the required solution.
Answer:
- <em>The effective nuclear charge of an electron in a 5p orbital of iodine is </em><u> 5</u>
Explanation:
The <em>effective nuclear charge, Zeff </em> is the net charge when you subtract the charge of the shielding electrons (number of electrons between your electron and the electrons in levels closer to the nucleus than yours) from the total nuclear charge (number of protons). Too many words, so see the equation:
- Zeff = atomic number - shielding electrons
Iodine has atomic number (number of protons) equal to 53.
Hence, the neutral atom also has 53 electrons.
The electron configuration of iodine is [₃₆Kr] 5s² 4d¹⁰ 5p⁵ (36 + 2 + 10 + 5 = 53)
So, iodine has 5 p electrons and they belong to the highest energy level. The remaining 53 - 5 = 48 electrons are in lower energy levels, and they are the shielding electrons. That is why the shielding parameter is 48.
So, you just must use the equation:
- Zeff = atomic number - shielding electrons
- Zeff = 53 - 48 = 5 ← answer