[Hemidol]

I was calculating the average density of using these values:

1.0580g/mL + 1.0604g/mL / 2

And I got the answer 1.0592g/mL --> Would I round this to just 1 as per sig fig rules or is the number 2 (divided by 2) considered an exact number and therefore keep it as 5 sig figs?

Thanks.

[renge ishyo]

The number 2 is not a measurement, but an exact number. So yeah, 5 sig figs sounds good 

[Leeple Stays]

The rule we use is always go with the number with the smallest amount of Sig Figs.

[billnotgatez]

Was the way you wrote 2 in your formula arbitrary?
Could you just as easily wrote it as 2.00000000 since it is an exact number? If you did that would you not then have 5 significant figures?

[Fridushka]

The rule we use is always go with the number with the smallest amount of Sig Figs.

This is in the case of division and multiplication..
So it shoud be applied

1.0604g/mL / 2

for this part...

While for addition and subtraction the rule says go with the least precise number..