What vitamin is produced by a mammalian skin?

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.