Give the concentration of solution which contains 2.5g of sugar dissolved in 50g of water.

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The concentration of solution which contains 2.5 g of sugar dissolved in 50 g of water is 5 % (w/w)

Explanation: -

Amount of sugar = 2.5 g

Mass of water = 50 g

Concentration of sugar = x 100

= 5%

Thus the concentration of sugar is 5 % (w/w)

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.