You need a control so you have something to compare the experimental group on-- If you don't have a control group, how will you know what's changed?
<span>The electrons get energy by the potential</span><span> force when we apply potential difference to a conductor moving from low to high therefore, the electrons move one to another creating electricity.</span>
Answer:
Number of moles (n)=
molecular weight
weight
Weight=n×Molecular weight
=0.5×14
Mass=7g
<span>If you look up the density of Acetone (Propanone in IUPAC names) you will find it is 0.7925g/cm3. This is the same as 0.7925g/ml.
You can calculate mass using the equation:- mass = density x volume
In your example mass = 0.7925 x 28.40 = 22.51g</span><span>
I think That's right. Hope this helps!!! Good luck!</span>
