If you have 340mL of a 0,5 M NaBr
solution, what will the concentration
be if you add 560mL more water to
it? (Hint: you need the final volume of
the solution)
O
1.3 M.
O 0.30 M
O 0.19 M.
O 0.77 M

h let me think

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.

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.