A Calculate the concentration (in mol/dm) of the
following solutions
1.0 mol of sodium hydroxide is dissolved in
distilled water to make 500cm of solution.
b 0.2 mol of sodium chloride is dissolved in
distilled water to make 1000 cm of solution.
0.1 mol of sodium nitrate is dissolved in
distilled water to make 100 cm of solution.
d 0.8 g of solid sodium hydroxide is dissolved in
distilled water to a final volume of 1 dm'.
(4; H = 1,0 = 16, Na = 23)
C

the correct answer would be d. hope this !

b. is the answer hoped i        

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

answerapplication program;