what is conc. of sugar in mol/L if its 20g are dissolved in in enough water to make a final volume up to 2L.?

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what is conc. of sugar in mol/L if its 20g are dissolved in in enough water to make a final volume up to 2L.?

please explain in detail

2007-04-26 22:04:47 · 2 answers · asked by mathiphy 2 in Science & Mathematics ➔ Chemistry

2 answers

formula of Molarity:
M = mol / L

formula to get number of moles of solids:
mol = g/MW

simply substitute the given data to the formula
M = 20g/ 342 g/mol / 2L

You only need to know this mol = g/MW. You don't need long explanations.

2007-04-27 03:24:26 · answer #1 · answered by zanekevin13 4 · 0⤊ 0⤋

0.0292397661 mol/l

Molar mass is 342 g

2007-04-27 05:10:08 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋