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# %w/v watch

1. Express 0.100moldm-3 in %w/v (molecular weight = 300gmol-1) Does anyone know how to approach this question ? Thank you
2. (Original post by j582)
Express 0.100moldm-3 in %w/v (molecular weight = 300gmol-1) Does anyone know how to approach this question ? Thank you
change mol into mass, working with 1 litre of solution to simplify things (1000ml).

Then divide the mass by 10 to get mass per 100 ml = % (percent means per 100)
3. (Original post by charco)
change mol into mass, working with 1 litre of solution to simplify things (1000ml).

Then divide the mass by 10 to get mass per 100 ml = % (percent means per 100)

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