10 g of glue with 13 g of water ,
Mass ratio of the material can be calculated as:
8 g of sodium borate suspended in 11 g of water, mass ratio can be calculated as:
As Jesse's hybrid accelerates to pass a car on the highway, he notices that his gas mileage drops from 40 miles per gallon to 15
2 answers:
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Answer:
<em>3.27·10²³ atoms of O</em>
Explanation:
To figure out the amount of oxygen atoms in this sample, we must first evaluate the sample.
The chemical formula for sodium sulfate is <em>Na₂SO₄, </em>and its molar mass is approximately 142.05.
We will use stoichiometry to convert from our mass of <em>Na₂SO₄ </em>to moles of <em>Na₂SO₄</em>, and then from moles of <em>Na₂SO₄ </em>to moles of <em>O </em>using the mole ratio; then finally, we will convert from moles of <em>O </em>to atoms of <em>O </em>using Avogadro's constant.
19.3g <em>Na₂SO₄</em> · ·
·
After doing the math for this dimensional analysis, you should get a quantity of approximately <em>3.27·10²³ atoms of O</em>.
Answer : The equilibrium pressure is,
Explanation :
The given balanced chemical reaction is,
First we have to calculate the standard free energy of reaction .
where,
= standard free energy of reaction = ?
n = number of moles
Now put all the given values in this expression, we get:
Now we have to calculate the value of
where,
= standard Gibbs free energy = -90.72 kJ/mol
R = gas constant = 8.314 J/mole.K
T = temperature = 298 K
= equilibrium constant = ?
Now put all the given values in this expression, we get:
Now we have to calculate the value of .
The given balanced chemical reaction is,
The expression for equilibrium constant will be :
In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.
Let the equilibrium pressure be, x
Pressure of = Pressure of
= x
Now put all the given values in this expression, we get
Thus, the equilibrium pressure is,