Chemistry

A 4g of sugar cube sucrose (C12 H22 O11) is dissolved in a 350ml teacup of 80 degree census of water
1: What will be the molarity of the sugar
2:What is the percentage composition by mass of the sugar

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  1. molar mass of sucrose ... 342 g

    molarity = moles per liter = (4 / 342) / .35

    % mass = [4 g / (4 g + 350 g)] * 100%

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  2. I assume you meant 80 Celsius.
    M = mols/L and mols = grams/molar mass
    mols C12H22O11 = 4/342 = estimated 0.013
    mols/L = estimated 0.013/0.350 = ?

    %by mass = grams sugar/100 g solution
    (4/354)*100 = ?

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    DrBob222

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