Aperson is told to take 1.25mg of vitamin d daily .how many 0.500-mg tablets should this person take ?

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

Air can be considered a mixture. which statement does not explain why?

What is the name of the enzyme that forms at the start of transcription?