[stinebean]

We had stools that we could sit on, but just a few weeks into the class I realized that, for me, the stool just got in the way and I stopped using mine.

[NICUDreamer11]

We have stools in our Chem lab too and I have never heard of not being allowed to have chairs in a lab? I don't understand why it would be unsafe to have chairs - I feel sorry for you all who cannot sit down. I was glad to have chairs for the long labs, even though most of the time I only sat while the Prof was talking not while doing experiments.
On the subject of mole/gram conversions - I agree with poster who said to just keep doing tons of them over and over again and would also suggest you try to find someone you know or in your class to help you one on one because that seems to be the best way to understand math problems, at least for me.

[busymomto4]

okay, sorry but all my numbers got misaligned on my last reply so it probably doesn't make sense
tried to repost, but numbers all askew again