Approximately how many atoms thick is a cell membrane, assuming all atoms there average about twice the size of a hydrogen atom? assume that a hydrogen atom is about 10-10 m big.

The cell membrane is about 37.5 and 50 atoms.

Explanation:

You need to know that cell membranes are about 7.5 and 10 nm in thickness, so if each atom is 0.2 nm (remember that 1nm = 1*10⁻⁹ m) you just need to divide 7.5 and 10 by 0.2 nm. The two answers are 37.5 and 50, so the cell membrane is about 37.5 and 50 atoms.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.