That is called a formula.
Subscript (:This is a subscript: (Na2) the "2" is the Subscript.
You need a lot energy to melt the metal compound and then you'd need a great deal of electrical energy to extract the metal from the molten compound.
Mixtures containing equal amounts of levo- and dextro- forms of a compound and thus do not rotate the plane of polarized light passing through the mixture.
Cocoyam contains varying amounts of calcium oxalate, potassium, zinc and magnesium. The proportions of these substances depend on the exact variety of the cocoyam.
If you are referring to a chemical compound, then there isn't a stable compound with that exact formula.
Chemical
Lipids
the emperical formula
That is called a formula.
A chemical formula tells what elements make up a compound and the exact number of atoms of each element in a unit of compound. :)
It is almost a compound - calcium carbonate - but with little amounts of other substances which makes it, technically, a mixture.
A vitamin
Yes
So that they get exact amounts, making experiments worthwhile
They are pure substances. Each has an exact formula.
Physically, a mixture. Chemically, a compound.