Moles Definition and 202 Threads

Hello everyone. I have a slight problem with my chemistry and was wondering if there is someone that could help me. Chemistry is not my strong point so please go easy. Thank you. --------------------------------------------------------------------- The problem is that I have gotten mixed up...

I was wondering if any of you guys could solve this problem for me with complete solutions. I have been at it for a couple of hours and I am running out of pencil. I would really appreciate your help! Problem: A helium balloon is used to lift a load of 110 N. The weight of the balloon's...