<h2>
Hello!</h2>
The answer is:
There are 732.24 grams of Dinitrogen Pentoxide 
in 6.78 moles of the same compound.
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Why?</h2>
The dinitrogen pentoxide, or nitrogen pentoxide, is a rare salt that consists of anion and cations, and it's an important compound when preparing some kinds of explosives.
So, to answer the question, first, need to look for the molecular formula of the dinitrogen pentoxide, then, use it to calculate the mass in gram of 6.78 moles of the same compound.
The dinitrogen pentoxide formula is:
Where, the molar mass of each element are:
Calculating the molar mass of the compound, we have:
Now, calculating what is the mass of 6.78 of , we have:
So, there are 732.24 grams of Dinitrogen Pentoxide in 6.78 moles of the same compound.
Have a nice day!
Answer: 1.15M
Explanation:
Given that,
Amount of moles of NaOH (n) = ?
Mass of NaOH in grams = 23.0g
For molar mass of NaOH, use the atomic masses: Na = 23g; O = 16g; H = 1g
NaOH = (23g + 16g + 1g)
= 40g/mol
Since, n = mass in grams / molar mass
n = 23.0g / 40.0g/mol
n = 0.575 mole
Volume of NaOH solution (v) = 0.5 L
Concentration of NaOH solution (c) = ?
Since concentration (c) is obtained by dividing the amount of solute dissolved by the volume of solvent, hence
c = n / v
c = 0.575 mole / 0.5L
c = 1.15 M (M stands for molarity and gives the concentration in moles per litres)
Thus, the molarity of the solution is 1.15M
Answer b, cellular and photosynthesis are reversible
Answer:
No empty orbitals but five unpaired electrons.
Explanation:
Hello there!
In this case, when going over the empty orbitals in valence energy levels, it is required to develop the electron configuration in order to appropriately describe the element. In such a way, for the element whose atomic number is 25 because it equals the number of electrons, we obtain:
It means that the d orbital is half filled which means that it does not have any empty orbital wherein two electrons are contained per orbital. Moreover, we can find 5 unpaired electrons according to:
↑ ↑ ↑ ↑ ↑
Which is the orbital notation.
Best regards!
Answer:
Empirical formula of a compound means that it provides simplest ratio of whole number.
Explanation:
QUESTION-1
Given,
Mass of boron and chlorine is 9.224% and 90.74%
Then, Boron- 9.224×
=0.85 mol (Mass value of boron=10.811)
Chlorine- 90.74×
=2.559 mol.(Mass value of chlorine=35.453)
By dividing the mole value with smallest number, then we will get-
Boron-
=1
Chlorine-
=3
The empirical formula of the compound is -BCl₃
QUESTION-2
BCl₃⇄B+ 3.Cl (Putting the actual mass number of boron and chlorine we will get-)
1×(10.811)+ 3×(35.453)=117.17g/mol
Molecular formula=
= 
≈1
The molecular formula is same with the empirical formula.
