What are the units for Molar Mass in Chemistry and Physics?

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Homework Help Overview

The discussion revolves around the units for molar mass in the contexts of chemistry and physics. Participants are exploring whether there is a difference in the units used in these two fields.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the appropriateness of using different units such as g/mol and kg/mol in chemistry and physics. Some express uncertainty about which unit is considered correct.

Discussion Status

The discussion is ongoing, with various perspectives being shared. Some participants suggest that both units are acceptable depending on the context, while others emphasize the importance of adhering to the preferences of instructors.

Contextual Notes

There is mention of differing preferences among teachers regarding the units for molar mass, and participants are considering how to approach assignments based on these preferences.

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Unit for Molar Mass(M)??

Homework Statement


What's the unit for Molar mass? Is it different in CHemistry and Physics?

Homework Equations


PV=nRT

The Attempt at a Solution


In Chemistry class(last year) I think I used (g/mol).
But in Physics, my teacher says it's (kg/mol).
What is right??
THanks
 
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SAT2400 said:

Homework Statement


What's the unit for Molar mass? Is it different in CHemistry and Physics?

Homework Equations


PV=nRT

The Attempt at a Solution


In Chemistry class(last year) I think I used (g/mol).
But in Physics, my teacher says it's (kg/mol).
What is right??
THanks

In Physics, the SI unit for mass is the Kg. In chemistry, it usually is grams but it also depends on the type of questions you do and what S! unit the question asks for.
 


g/mol, kg/mol, slugs per mol, and (whatever other mass unit) per mol are all fine for both physics and chemistry. However, it may be more convenient to use a certain unit for certain calculations.
 


It is like asking which is a 'correct' pressure unit - PSI, atm or Pascal.
 


In your assignments and tests, use whichever you feel more comfortable with. Then just convert the answer to the units your teacher wants. There is no "correct" unit here, just your teacher's personal preference.

If you are careful to always make sure your units check out and cancel properly, there should be no problem.
 

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