Answer:
2 moles
Explanation:
Let us first start by calculating the molecular mass of Al₂O₃.
The mass of a mole of any compound is called it's molar mass. 1 molar mass 6.02 X 10²³, or Avogadro's number, of compound entities.
Say, 1 mole of Al₂O₃ has 6.02 X 10²³ of Al₂O₃ molecules/atoms. It also has 2*6.02 X 10²³ number of Al atoms and 3*6.02 X 10²³ number of O atoms.
Molecular mass of Al : 26.981539 u
Molecular mass of O: 15.999 u
Therefore, molecular mass of Al₂O₃ is:
= 
u
= 101.960078 u
This can be approximated to 102 u.
1mole weighs 102 u
So, 2moles will weigh 2*102 = 204 u
Answer:
1600/27 cubic yards
Explanation:
Convert each of the dimensions into yards, getting 10/3, 20/3, and 8/3. Multiply them all to get 1600/27
Answer:
Mole fraction of alcohols in liquid phase 
.
Mole fraction of alcohols in vapor phase 
.
Explanation:
The total vapor pressure of the solution = p =38.6 Torr
Partial vapor pressure of the n-propyl alcohol =
Partial vapor pressure of the isopropyl alcohol =
(Raoult's Law)
is mole fraction in liquid phase.
Mole fraction of components in vapor phase 
(Dalton's law of partial pressure)
Mole fraction of alcohols in vapor phase
In general, a scientific law<span> is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or </span>what<span> causes it. The explanation of a phenomenon is called a </span>scientific theory<span>. It is a misconception that </span>theories<span> turn into </span>laws<span> with enough research
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