Answer:
the 1st and 4th one. index fossils r imprints and also it is individual animals making the print so it is unique
Answer:
KMnO4,H3O^+,75°C
Explanation:
The conversion of cyclohexene to trans-1,2-cylohexanediol is an oxidation reaction. Alkenes are oxidized in the presence of potassium permanganate and acids to yield the corresponding diols.
These diols may also be called glycols. They are molecules that contain two -OH(hydroxyl) groups per molecule. The reaction closely resembles the addition of the two -OH groups of hydrogen peroxide to an alkene.
The bright color of potassium permanganate disappears in this reaction so it can be used as a test for alkenes.
I think air but if wrong sorry
When two liquids are completely soluble in each other in all proportions, they are said to be miscible<span>. For example, ethanol and water are </span>miscible<span>. If the liquids do not mix, they are said to be </span>immiscible<span>.</span>
Al2(SO4)3 + 3CaCl2 > 2AlCl3 + 3CaSO4
