The greatest concentration of public land is in

a. texas
b. new england
c. alaska
d. idaho

answer; both surfaces of the membrane are nonpermeable

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.