about 500 hundred
nobody can answer that question properly.
Does not exist.
Sodium oxide is a chemical compound with the formula Na2O. It is used in ceramics and glasses.- From the WikipediaYes Na2O does exist.
Formula 1 racing will exist as long as the International Automobile Federation can turn a profit with the series. Since it is now very profitable, expect Formula 1 racing to exist for many years.
Such a compound does not exist.
There can be no such formula in general. A formula will exist if the area is a regular polygon (or a circle).
Fiber food is not a compound and a chemical formula doesn't exist.
The chemical formula of sulfur carbonate is (CS2O3)n.
This formula may be I7Cl but I suppose that this compound doesn't exist.
BBD stands for "Barrel Blocking Devise". A barrel cover is the best example. The term was introduced to get away from calling them "barrel plugs" which do exist but are not nearly as safe. A barrel plug will only stop 1 paintball from coming out but will not stop a 2nd, 3rd or 55th shot after the first, a BBD will stop all paintballs from coming out of the barrel.
The chemical formula of sodium nitrate is NaNO3. Na(II) doesn't exist !
Lithium oxide does not exist as molecules, as it is an ionic compound.