If 18gram of glucose is dissolved in 100 gram of water. The concentration of the resulting solution is?

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answers:
david say: you can calculate molality, not molarity, based on given info. --- you can also do % by mass or even mass/volume
.. molality = moles solute / kg solvent
= (18/180) / (100/1000)
= .1 / .1 = 1m
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billrussell42 say: depends on how you want to measure it.

18g/100g or 18% by mass is one method.
correction: 18/118 or 15% by mass

IF you wanted molar concentration:
Glucose has a molecular weight of 180.16 g/mol
18g is 18/180.16 or about 0.1 mol
100g of water is 100 mL in volume or 0.1 L
so the molar concentration is 0.1 mol / 0.1 L = 1 mol/L
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John say: 18 g / 118g
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