10 points 1. An atom of a certain element has the atomic number 89 and the mass
of 227 amu. How man neutrons does the atom have? *
a. 89
b. 227
C. 138
O d. 316
2. An atom of Be has four protons, five neutrons and four electrons. What 10 points
is the mas of Be? *

Carbon dioxide and Oxygen are the two gases of air which dissolves in water by diffusion The oxygen is dissolved in water so that fishes can take in oxygen through water to breathe, this is the biological importance of this process in nature. ... Fizzy drinks contain carbon dioxide dissolved in water.