A jar of jelly beans is a heterogeneous mixture.
It depends on how big the jar is. There are many sizes of jelly jars. A lot of jelly jars will say how much actual jelly there is in the jar.
you just put it in the jar
Yes, the jelly beans aren't dissolved and you cannot see the separate parts.
No, it is not.
No, it is not.
Yes, it is.
1200
3429 beans in the jar
If the jar were made of lead, only a few jelly beans would fit in --- maybe 10 ;-)
450 are in a jar but your's might be different
depends on brand