Your cell membrane is found in all cells, yes. Why do you ask? Well... technically why do you put a question mark down in a sentence?
Answer:
Here's what I think
Explanation:
They wanted you to understand that, to a geologist, the stripes on the rock are like the pages of an encyclopedia of information.
You start reading and getting information from page 1 of an encyclopedia, then go on to the next page, and so on.
In the same way, the lowest layer of stripes is the oldest and gives information on the earliest geological period. The layer above it gives you information on the next period, and so on.
Answer:
16 moles
Explanation:
from the equation:
4Fe + 3O2 -----> Fe2O3
the mole ratio of Fe to O2 follows,
3 moles O2 reacts with 4 moles Fe.
therefore,
1 mole O2 reacts with 4/3 moles Fe
and 12 moles O2 reacts with (4/3) × 12 moles Fe = 16 moles