...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) ...
... the mass of the aspirin tablets used = b g Correct calculations ("the current answer"): Mole ratio acetylsalicylic acid : NaOH = 1...
...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...
...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...
... left gives the amount of NaOH used. The calculation is outlined as follows : 圖片參考：http://i248.photobucket...
...total pressureand the pressure of the water vapour. The steps of calculation are shown below : Temperature, T = 297 K ...
...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...
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...
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...
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...