Strip were cut lengthwise from the main stem of herbaceous plant. the following diagram shows the strips after placing them in different solution a) account for the results obtained when the strips were put in:
i) distilled water
ii). a salted solution

b) why is the strip curl slightly outwards after being placed in distilled water?

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.