You accidentally added 50 ml of distilled water to 33 ml of a 50 % (m/v) sucrose solution. what is the molarity of the diluted solution

we are given a 50% (m/v) solution of sucrose and initial volume = 33 ml

It implies mass of sucrose in this solution = (50×33 ) / 100 = 16.5 grams

∴ moles of sucrose in solution = mass of sucrose / molar mass of sucrose

                                                   = 16.5 g÷ (342.3 g/mol) = 0.0482 moles

Now after accidentally adding water only the volume of solution changes but the moles of sucrose remains same.

Thus, new volume = 33 ml + 50 ml = 83 ml = 0.083 L

we know, molarity is defined as number of moles of solute per volume of solution in L.

∴ Molarity of new solution = 0.0482 moles ÷ 0.083 L

                                            = 0.5807 M

Ans- 0.5807 M

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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