Answer: c
Explanation : because it make sense the most (srry if im wrong!)
Cells are surrounded by #2 , Cell membrane and Cell wall thats what protects the cell
Any of the other alkali metals not mentioned (I.e. rubidium, caesium or francium). They are all group one metals meaning that they contain one valence (outer shell) electron so they will have similar properties. Francium is the most reactive alkali metal while lithium is the least reactive (if you’d like me to explain that let me know :) )
Explanation:
The given data is as follows.
Mass of refrigerant, m = 10 kg
Volume of the refrigerant, V = 1.595 
Formula for specific volume of the refrigerant is as follows.
v = 
= 0.1595 
So, at
specific volume will be within
and
and pressure is constant.
The fluid will be in super-heated state at temperature
and at T =
pressure 1 bar = 0.1 MPa.
According to super-heated tables, the specific volume is v = 0.30138
.
Hence, the final volume will be calculated as follows.

= 
= 3.0138 
Thus, we can conclude that final volume of the R-134a is 3.0138
.
c both of the above the oh ranges from 0 to 14 a ph of 7 is neutral