求助化學計算題

Calculate the percent by mass oc the solute in each of the follwing aqueous solutions:

(a)5.50g of NaBr in 78.2g of solution

(b)31.0g of KCl in 152g of water

(c)4.5g of toluene in 29g of benzone

請寫計算式謝謝

1 Answer

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  • Anonymous
    2 decades ago
    Favorite Answer

    計算式

    a ( 5.50 / 78.2 )* 100%

    b (31 / (31 + 152)) *100%

    c (4.5 / (4.5+29)) *100%

    2005-12-11 15:48:52 補充:

    我發現你一直在問同樣題型的問題..

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