the shinny finish of wall after white wash is because of a) calcium carbonate ,b) calcium hydroxide c) calcium carbonate d) calcium phosphate​

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

How does the attraction between particles affect the ability of a solvent to dissolve in a substance

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?