claytonp7695
05.05.2022 •
Biology
DU
Diamand
Topac
Orthoclane
Mohs Hardness Scale
Scale Number
2 min
9
Common Object
Masonry Drill Bit
8.9)
Steel Nail (55)
Khille/Glass
Plate (5.5)
-Fuorte
Copper Penny (3.9
Gypsun
2
1
19. A geologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. Based
on this information, the sample mineral has to be softer than
O A fluorite.
OB. orthoclase.
OC. corundum.
O D. apatite.
Solved
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Ответ:
The correct option is;
A, B, and C, only
Explanation:
The amino group is the functional group of the form CH-NH₂ consisting of single bonds formed between hydrogen atoms, aryl groups, alkyl groups or two or more of such groups combined together bonded with a nitrogen atom. An amine is an organic compound that has an amino group in its composition or structure
Therefore, the amino group can be found in the molecules of A, B, and C only.