Use molar mass of D2O to calculate the density of heavywater

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Homework Help Overview

The discussion revolves around calculating the density of heavy water (D2O) using its molar mass. Participants are exploring the relationship between molar mass and density, particularly for substances that are not gases.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • One participant questions how to transition from molar mass to density for a liquid, while others suggest comparing the molecular characteristics of D2O and H2O, particularly regarding the impact of neutrons on molecular size and interactions.

Discussion Status

The discussion is ongoing, with participants seeking clarification on the problem's requirements and exploring the implications of molecular differences between D2O and H2O. There is no consensus yet, but some guidance has been provided regarding the comparison of molecular properties.

Contextual Notes

There is a request for clarification on the specific calculations needed, indicating potential ambiguity in the problem statement. Additionally, a correction regarding the terminology used to describe the components of D2O has been noted.

Cory522
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Homework Statement


how can you go from molar mass to density if its not a gas

Homework Equations


molar mass = 20.0276 g/mol

The Attempt at a Solution


none
 
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Hi Cory, welcome to PF!

Compare the number of D2O molecules in unit volume to that of water. Do the extra protonsEdit: neutrons change the size and interaction between the molecules appreciably with respect to H2O?
 
Last edited:
ehild said:
Hi Cory, welcome to PF!

Compare the number of D2O molecules in unit volume to that of water. Do the extra protons change the size and interaction between the molecules appreciably with respect to H2O?
It's not extra protons in D2O, it's extra neutrons.
 
Could you please explaing the problem once again, Cory? What exactly needs to be calculated?
 
SteamKing said:
It's not extra protons in D2O, it's extra neutrons.
Of course, a great typo! Thanks. :)
 

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