Answer: capsaicin C18 H27 NO3
Explanation: I just know the last one sorry G
Answer:
Explanation
Hardness has been defined the level of difficulty with a smooth surface of a mineral may be scratched. The hardness of a mineral species is upon the strength of the bonds which compose its crystal structure Hardness is measured of how easily a material can be scratched or indented Hard materials are often very brittle.
During the Last Glacial Maximum, much of the world was cold, dry, and inhospitable, with frequent storms and a dust-laden atmosphere. The dustiness of the atmosphere is a prominent feature in ice cores; dust levels were as much as 20 to 25 times greater than now.