Schrodinger developed a famous equation that allows the solutions for electron wave functions to be found given a specific potential. For the case of an atom, Schroginger's equation allows the determination of electron wave functions. These wave functions tell us how electrons are distributed in space around the atom.
Answer:
30 gallons of the first brand and 150 gallons of the second one.
Explanation:
We have two unknown quantities, and , so it is necessary to write two equations that relate that variables. First, we are going to consider that the volume is an additive property, which means that if you mix and gallons the final volume V will be:
The other equation we will write is based on a mass balance of the antifreeze. We know that the content of antifreeze in a given volume is the multiplication of that volume by the concentration, so the mass balance would be:
It means that the total of the antifreeze in the final mix (which is ) is equal to the sum of the antifreeze that was on the first brand volume (V_1*x_1) and the antifreeze that was on the second brand volume (V_2*x_2).
Now we have a two equation two unknown system, so let's solve it:
From first equation:
,
Replace on the second one.
Finally, from ,
Hello the density is 49.78 g/cm^3 of the object
<h3>Answer</h3>
Heat : 12 kJ, to maintain hydrogen bonds
<h3>Further explanation</h3>
Given
A 2.00mole sample ⇒ n = 2 mol
H₂O(s) at 0°C melted, producing H₂O(l) at 0°C
Required
the amount of heat required
the changes that took place
Analysis
Conversion of mol to mass
Use formula of Heat :
Q = mLf (melting/freezing)
Lf=latent heat of fusion (for water=334 J/g)
Solution
mass H₂O(MW=18 g/mol) :
Heat required :
The absorbed heat is used to maintain hydrogen bonds in water molecules (there are two hydrogen bonds per molecule)
Paraphrase
The amount of heat required : 12 kJ, and to maintain hydrogen bonds
The answer for the first one is the second option.
The answer for the second one is the last option.
Hope this helped and have a nice day : )