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4 years ago

According to Hund's rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until

2 answers:

8 0

Hund's Rule<span>. </span>Hund's rule<span>: every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin. so D. is the answer</span>

anastassius [24]4 years ago

4 0

D. all the orbitals contain one electron, with spins parallel

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Helium is mixed with oxygen gas for deep-sea divers. Calculate the percent by volume of oxygen gas in the mixture if the diver h

kvasek [131]

Answer : The percent by volume of oxygen gas in the mixture is, 5.3 %

Explanation :

According to the Raoult's law,

$p^o_A=X_A\times p_A$

where,

$p_A$ = total partial pressure of solution = 3.8 atm

$p^o_A$ = partial pressure of oxygen = 0.20 atm

$X_A$ = mole fraction of oxygen = ?

Now put all the given values in this formula, we get:

$p^o_A=X_A\times p_A$

$0.20atm=X_A\times 3.8atm$

$X_A=0.0526$

Now we have to calculate the percent by volume of oxygen gas in the mixture.

The mole percent of oxygen gas = $0.0526\times 100=5.3\%$

As we know that, there is a direct relation between the volume of moles.

So, mole percent of oxygen gas = volume percent of oxygen gas

Volume percent of oxygen gas = $0.0526\times 100=5.3\%$

Therefore, the percent by volume of oxygen gas in the mixture is, 5.3 %

5 0

4 years ago

What color is a window

Amiraneli [1.4K]

Answer:

Window

Explanation:

There is no explonation

3 0

3 years ago

Read 2 more answers

The molar mass of KCl is 74. 55 g/mol. If 8. 45 g KCl are dissolved in 0. 750 L of solution, what is the molarity of the solutio

rosijanka [135]

Molarity is the strength of the solution or the ratio of the moles and the volume of the solution. The molarity of the solution is 0.1516 mol per Liter.

<h3>What is molarity?</h3>

Molarity is the molar concentration of the solution that tells about the amount of the solute or the substance dissolved in the given amount of the solution.

Given,

Mass of potassium chloride = 8.45 g
Molar mass of potassium chloride = 74. 55 g/mol
Volume of the solution = 0.750 L

Moles can be calculated by:

$\begin{aligned}\rm Moles &= \rm \dfrac{Mass }{\rm Molar \;mass}\\\\&= \dfrac{8.45}{74.55}\\\\&= 0.1133\;\rm mol\end{aligned}$

Calculate molarity by:

$\rm Molarity = \dfrac{moles}{\text{Volume in L}}$

Substituting values in the equation:

$\begin{aligned}\rm Molarity &= \dfrac{0.1133}{0.750}\\\\&= 0.1516 \;\rm mol\;L^{-1}\end{aligned}$

Therefore, the molarity of the solution is 0.1516 mol per Liter.

Learn more about molarity here:

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4 0

2 years ago

What do the results tell you about your hypothesis(es)? How do the data support your claim above?

Oliga [24]

Answer: It tells you if your hyposthesis was incorrect or correct from the data. The data supports this because you tested and got your results correctly which will help you to form a hypothesis.

Explanation:

8 0

3 years ago

Based on this equation: 2AL + 3CuCl2 -> 2AlCl3 + Cu ... how many grams of copper(II) chloride dihydrate would be required to

PolarNik [594]

2Al + 3CuCl2 ➡ 2AlCl3 + 3Cu. Moles of Al = 1.2/27 = 0.045 moles 2 moles of Al reacts with 3 moles of CuCl2. Therefore, 1 mole of CuCl2 reacts with =2/3 x moles of Al = 2/3 x 0.045 = 0.03 moles.

6 0

3 years ago