N=14
H= 1(5)= 5
C=12(2)=24
O=16(2)=32
= 75
amino group
carboxyl group
R-group
single Hydrogen arom
C.
Anthracite has the highest carbon compact and fewest impurities.
Also, the highest calorific of all types of coal except for graphite.
I believe the answer would be A and C
Hope this helps <span>A vector always consists of a direction and magnitude. F</span>
