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gizmo_the_mogwai [7]
2 years ago
15

Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possibl

e, how many spectral lines will this atom exhibit
Chemistry
1 answer:
olya-2409 [2.1K]2 years ago
4 0

Answer:

Following are the response to the given question:

Explanation:

The number of shells

n = 4

Calculating the spectral line:

= \frac{n(n-1)}{2}\\\\ = \frac{4(4-1)}{2} \\\\= \frac{4\times 3}{2}\\\\ = \frac{12}{2}\\\\ = 6

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Sodium metal and water react to create sodium hydrogen and hydrogen gas through the unbalanced equation.
Maurinko [17]

Answer:

Theoretical yield = 2.5 g

Explanation:

Given data:

Mass of sodium = 79.7 g

Mass of water = 45.3 g

Theoretical yield of hydrogen gas = ?

Solution:

Chemical equation:

2Na + 2H₂O → 2NaOH + H₂

Number of moles of sodium:

Number of moles = mass/ molar mass

Number of moles = 79.7 g / 23 g/mol

Number of moles = 3.5 mol

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 45.3 g / 18g/mol

Number of moles = 2.5 mol

Now we will compare the moles of hydrogen gas with water and sodium.

                        H₂O           :             H₂

                           2             :              1

                          2.5           :            1/2×2.5 =1.25 mol

                     

                           Na           :              H₂

                             2            :               1

                           3.5           :             1/2×3.5 =1.75 mol

water will be limiting reactant.

Theoretical yield:

Mass = number of moles × molar mass

Mass =  1.25 mol  × 2 g/mol

Mass = 2.5 g

8 0
2 years ago
What is the percent by mass of water in Na2SO4 • 10H2O?
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We determine the percent by mass of water in the compound by dividing the mass of  water by the total mass. The total mass of Na2SO4.10H2O is equal to 322 g. The mass of water is 180 g. 
       
                    percent by mass of water = (180 / 322)*(100 %) = 55.9%
5 0
3 years ago
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You and your roommates have already decided to spend a week volunteering in the relief effort over the winter break, but in orde
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Answer:

I dont know the answer for that question it's hard question isn't it

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3 years ago
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Discuss the shapes of s- orbitals, p-orbitals and d-orbitals.
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The azimuthal quantum number (l) determines its orbital angular momentum and describes the shape of the orbital.

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d-orbitals are butterfly shaped.

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2 years ago
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D. microwaves, Ultraviolet, x-rays
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