Question

2
Example 3.4 Calculate the mass of the
following:
(i) 0.5 mole of N, gas (mass from mole
of molecule)
(ii) 0.5 mole of N atoms (mass from
mole of atom)
(iii) 3.011 x 1023 number of N atoms
(mass from number)
(iv) 6.022 x 1023 number of N,
molecules (mass from number)
​

Answer 1

a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and regulates the passage of molecules in and out of the cytoplasm.