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:
commutative
Step-by-step explanation:
you are typing the same numbers but in different order
Answer:
C
Step-by-step explanation:
y < 5 and y < 2 over lap at y < 2
