How Do You Calculate Molality and Mole Fraction in Aqueous Nitric Acid?

In summary, a student is struggling with a course that requires reviewing first year material. They are specifically having trouble understanding a problem involving calculating the molality, mass %, and mole fraction of aqueous nitric acid. They are confused about the concept of a solute and solvent, but it is clarified that aqueous nitric acid refers to nitric acid dissolved in water. The student requests for someone to go through the problem with them.
  • #1
n77ler
89
0
Ok so I just started this course and we have to so review from first year stuff but I am completely lost and have no idea how to do the questions. There are a bunch so could someone just run through one with me please?

Commercial aqueous nitric acid has a density of 1.42g/mL and is 16.0mol/L HNO_3(aq). Calculate the molality, mass % and mole fraction of the HNO_3 present.

I don't understand because I thought there needed to be a solute and a solvent but here it seems like its asking about just one thing.
 
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  • #2
Aqueous nitric acid means nitric acid (solute) dissolved in water (solvent). The term aqueous means that the solvent is water.
 
  • #3
ok so HNO_3 + H_2O -----> NO_3- + H_3O+

Im sitll confused how the initial values are linked I'm getting extremely frustrated I'm falling behind because I cannot figure out the basics. PLease go through it with me!
 
  • #4
answered
 

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Physical chemistry is a branch of chemistry that focuses on the study of physical properties and behavior of matter, as well as the underlying principles that govern these properties. It combines concepts from physics, mathematics, and chemistry to explain and predict the behavior of chemical systems.

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