That depends on the environment that it was in. If it was a relatively germ-filled environment, then no... and it is always safest to throw things out if you aren't sure.
However, it could be fine, and heating it up to a cooking temperature again for enough time would likely make it safer, since lots of harmful things are destroyed at high temperatures.
yes
No. The leftovers should have been refrigerated.
No.
well it depends on how long it is left, a few hours then it would just congeal and you can add water to revive it,but yes eventually gravy does go moldy
it would separate into hydrogen and oxygen atoms.
If it has not been sitting out all night on the counter a room temp. then it would be ok to eat. But if it has been sitting out al night then you shouldn't eat it.
no unless you want food poisening * anonymus bert*
No. Leaving potentially hazardous food out at room temperature overnight is not safe.
Yes use it in your gravy. It has all the nutrients in it which have left the vegetable
To the left.
You can rewrite this sentence, I realized that I left my purse at the store on the counter by the cashier's station, by changing some of the clauses.I realized that I left my purse on the store's counter by the cashier's station.I realized that I left my purse on the store counter near the cashier's station.I realized I left my purse on the counter near the store's cashier station. (remove "that" as well)
It all depends on the circumstances. If the sausage gravy was left out all night without being refrigerated (anything like that), it will already be spoiled. The sausage gravy will need to be sealed and kept at a cool temperature. Anything like this will change the life, and my guess is that it will only be good for a few days (at most).