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  1. ...of the unit cell = (3.58 x 10-8)3 cm3 ========== Method I for the calculation of the density of Cu : (The method used in the question) ...

    分類:科學及數學 > 化學 2007年12月30日

  2. ... the mass of the aspirin tablets used = b g Correct calculations ("the current answer"): Mole ratio acetylsalicylic acid : NaOH = 1...

    分類:科學及數學 > 化學 2009年11月13日

  3. ...which is equal to a/b . if you want to check your steps of calculations or answers, post it up. and others, PLEASE, do not directly...

    分類:科學及數學 > 化學 2011年03月07日

  4. ...15 補充: atm (atmospheric pressure) is the unit of pressure. You have to calculation the pressure before the reaction and that after the reaction. Both pressures...

    分類:科學及數學 > 化學 2010年01月02日

  5. ... left gives the amount of NaOH used. The calculation is outlined as follows : 圖片參考:http://i248.photobucket...

    分類:科學及數學 > 化學 2009年12月16日

  6. ...total pressureand the pressure of the water vapour. The steps of calculation are shown below : Temperature, T = 297 K ...

    分類:科學及數學 > 化學 2011年10月07日

  7. ...molar mass of chlorine molecule (Cl2) and sulphur dioxide (SO2). the calculation is same as question 1. 5. molar mass of PbSO4 = 207.2 + 32.1 + 16...

    分類:科學及數學 > 化學 2011年01月17日

  8. 1. Mole ratio Fe : O = 72.4/56 : (100 - 72.4)/16 = 1.29 : 1.73 = 3 : 4 Empirical formula = Fe3O4 = = = = = 2. 2C8H18 + 25O2 → 16CO2 + 18H2O No. of moles of C8H18 = 800/(12*8 + 18) = 800/114 mol No. of...

    分類:科學及數學 > 化學 2011年11月13日

  9. You assumed thatthe monoprotic acid is completely dissociated to give the hydrogen ions. However, the pH value shows that it is not completely dissociated. pH = -(Log[H ]), so 2.69 = -(log [H ]) and...

    分類:科學及數學 > 化學 2008年05月25日

  10. Since when it is cooled down to the room temperature, the product has been condensed to liquid water. According to the given, no. of moles of water produced = 0.00083 moles which is equivalent to 0.015 g of water, i.e. 0...

    分類:科學及數學 > 化學 2007年05月31日