1. Hi!
I don't really understand why mole is a SI-unit. I mean, it's just a number, it has no dimension.

Edit: I meant "unit", not "enhet" (which is the Swedish word for unit (temporary confusion))

2. ### Related Discussions:

• Originally Posted by thyristor
Hi!
I don't really understand why mole is a SI-unit. I mean, it's just a number, it has no dimension.
Imagine a length, right? it has 2 dimensions, length and amount.

Amount is a dimension see?

• Originally Posted by LeavingQuietly
Originally Posted by thyristor
Hi!
I don't really understand why mole is a SI-unit. I mean, it's just a number, it has no dimension.
Imagine a length, right? it has 2 dimensions, length and amount.

Amount is a dimension see?
I'm afraid I don't quite see what you mean.

• Originally Posted by thyristor
Originally Posted by LeavingQuietly
Originally Posted by thyristor
Hi!
I don't really understand why mole is a SI-unit. I mean, it's just a number, it has no dimension.
Imagine a length, right? it has 2 dimensions, length and amount.

Amount is a dimension see?
I'm afraid I don't quite see what you mean.
Imagine that you had 0 lengths. Why, that has 0 dimensions.

So why did the length loose 2 dimensions when it just lost an amount?

Imagine now that you decreased the length to 0. how many dimensions are there now?

1, since the amount of the 0 long length is still one.

Need to discuss this more?

• Originally Posted by thyristor
Hi!
I don't really understand why mole is a SI-unit. I mean, it's just a number, it has no dimension.

Edit: I meant "unit", not "enhet" (which is the Swedish word for unit (temporary confusion))
because there is a difference between a gram-mole and a kilogram-mole, for instance

It is not just a number. Avagadro's number is a number.

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