That could depend how far past the sell by date it has gone. Whether or not you should eat it will be your decision.
If it looks good and tastes normal it is OK
Wrapped in butcher paper, about a month.
Yes. As long as the cheese is packed in an airtight vessel (preferably vacuum packed), you can safely freeze the cheese for months. When thawing, you should place the product in a refrigerator for 24 hours to allow it to thaw slowly, to protect the texture, consistency, and flavor.
Orange juice that is opened does not stay fresh for long if it is not refrigerated. You should not drink it if it has been out for longer than a couple of hours.
up to the use-by date
The "sale by" date lets the consumer know how long this item will be fresh or at its best. The stock employees also use this date to discard and replace items that are past their freshness date.
If you are talking about the fresh mozzarella that is stored in liquid, you should not allow it to be at room temperature except for the time it takes to get from the store to the home fridge and for preparation and serving time. It is highly perishable.
About 3-5 days.
if kept in fridge unopened, about a month.
There's no particular set time that mozzarella will grow mold. That will depend upon packaging, handling and the environment.
It's generally safe to eat M&M's after the expiration date as long as they look and smell fine. The expiration date is more of a quality guideline, so they may not taste as fresh or may have changed texture. Use your judgment and if in doubt, it's best to discard them.
only a few days, it is best eaten fresh
Probably, as long as they look fresh and are less than 6 months out of date.