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    :eek3:
    a few chem questions i dont understand how to answer
    1convert molar conc of 0.5m HCl soln to the percentage concentration

    2unknown substance contains 20.9moles NaCl how many grams of NaCL need to prepare 100cm3 of unknowsn substance

    please help
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    I have moved this thread to the chemistry academic help forum, you will get a better response here
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    thanks for editing the title too
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    (Original post by homer321)
    :eek3:
    a few chem questions i dont understand how to answer
    1convert molar conc of 0.5m HCl soln to the percentage concentration

    2unknown substance contains 20.9moles NaCl how many grams of NaCL need to prepare 100cm3 of unknowsn substance

    please help
    1. calculate the mass of HCl in 1 litre of the solution. The calculate % weight to vol.


    2. You need to reword this - it does not make much sense what you have written.
 
 
 
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