Answer:
Because the kind of compounfds that you try to determine using paper chromatography (organic compounds) are usually not soluble in water. Furthermore, water could react chemically with some of this compounds, because it's a very reactive molecule. You need organic solvents that are mostly inert.
Answer:
parallel
Step-by-step explanation:
all the details are in the attached picture.
-9 is the slope of the line.
1,450 because you would plug 75 in for x
f(x)= 20(75)-50
Answer:
w=4
Step-by-step explanation:
28=14w-7w whenever you work it out it equals w=4... happy to help :)