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Thread: How to workout the amount of moles present in this given question?

  1. #1 How to workout the amount of moles present in this given question? 
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    So here is the question..

    (b) A beaker contains 250cm3 of 0.3 mol dm-3 calcium hydroxide Ca(OH)2 solution.


    (i) How many moles of calcium hydroxide are present in 150cm3?










    This is what I think I should be doing but I have no idea whether it's correct...

    So I need to convert the 150cm3 to dm3 by 150/1000 = 0.15dm3

    and so the equation would be concentration x volume.... 0.15 x 0.3 mol dm-3 = 0.045

    and so the number of moles of calcium hydroxide in 150cm3 of solution is 0.045 moles?

    Thanks guys, help is really really life saving!


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  3. #2  
    Bullshit Intolerant PhDemon's Avatar
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    Your calculation is correct.


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  4. #3  
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    Thank you so much!
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