Anne completely fills the fuel tank of her car with a mixture of gasoline and ethanol, C2H5OH. When filled, the fuel tank contai
1 answer:
There are 51.09 moles of C₂H₅OH in the fuel tank
<h3>Further explanation </h3>A mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
moles can also be obtained by dividing the mass (in grams) with the molar mass
m = mass
M = relative molecular mass / molar mass
The fuel tank contains 2350 g of C₂H₅OH, so mol C₂H₅OH(MW= 46 g/mol) :
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Taking into account the change of units, the pressure of the gas sample is 87.19 kPa.
<h3>What is rule of three</h3>In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.
To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So:
The direct rule of three is the rule applied in this case where there is a change of units.
To perform in this case the conversion of units, you must first know that:
- 1 atm= 760 mmHg
- 1 atm = 1. 01325×10⁵ Pa= 101325 Pa
- 1 kPa= 1000 Pa
So, if 1 atm is 760 mmHg, how many atm equals 654 mmHg?
760 mmHg ⇒ 1 atm
654 mmHg ⇒ x
So:
Solving:
<u><em>x=0.86 atm</em></u>
Now, if 101325 Pa are 1 atm, how many Pa equals 0.86 atm?
1 atm ⇒ 101325 Pa
0.86 atm ⇒ x
So:
Solving:
<u><em>x= 87,192.83 Pa</em></u>
Finally, if 1 kPa is 1000 Pa, how many kPa equals 87,192.83 Pa?
1000 Pa ⇒ 1 kPa
87,192.83 Pa ⇒ x
So:
Solving:
<u><em>x=87.19283 kPa≅ 87.19 kPa</em></u>
In summary, the pressure of the gas sample is 87.19 kPa.
Learn more with this example:
#SPJ12
Answer:
<h2>0.92 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
From the question we have
mass = 16.1 g
volume = 17.5 mL
We have the final answer as
<h3>0.92 g/mL</h3>Hope this helps you