المصدر: حاسبة كيميائية رائعة في منتدى : قسم البرامج العلمية السلام عليكم اخوتي اقدم لكم برنامج الحاسبة الكيميائية وهو برنامج رائع يمكنكم من اجراء حسابات تحضير المواد الكيميائية بسهولة بالاضافة الى اجراء العديد من الحسابات الرياضية المعقدة ، اسأل الله ان يكون ذا فائدة للجميع EniG. Chemistry Assistant Version: 2.4Revision Date: 2002/12/19Type of software: FreewareOperating system: Windows 9x/NT/2000/XP INTRODUCTION EniG. Chemistry Assistant is an expression calculator for fast calculation molecular weight of compounds by simple entry of chemical formula, and replaces the element symbols with their atomic weight. Program translates the texts with chemical element symbols or without them into a mathematical expression and calculates them. The program includes functions for statistical analysis, solving the quadratic equation, physical constants, and prepare solution calculator. The element symbols can be written in lowercase letters, and the intelligent routine in the program will try to translate them and will show the result of translation - or it will report an error. The appearance of mathematical expression, which is the result of the translation, can be seen if the mouse pointer is held over the entry field. The right mouse button has several often used anions and molecules. The calculator feature is a list with task history in that storing all of your recent inputs and results. Chemistry Assistant also included a detailed help file that containing syntax, usage, and examples for all of the supported functions. The calculator also provides a list of common physical constants and performs various conversions between English and metric units. Every function that is supported by Chemistry Assistant can be inserted by clicking on the button with function name or type its name on the physical keyboard. Some functions are not associated with the buttons, but every function can be called by typing its name. Examples are available from Help menu. For example, when calculating the relative molecular weight of a copper(II)sulfate pentahydrate, type cuso4+5h2o And the smart converter will translate this text in the correct chemical formula CuSO4+5H2O If the chemical formula contains a mathematical operator (such as +, *, /, ...), smart converter will automatic add the parentheses in the expression (CuSO4)+5*(H2O) The next step is the change of chemical symbols with the molecular weight for each element (63.546+32.066+15.9994*4)+5*(1.00794*2+15.9994) The last step is calculate this created mathematical expression (63.546+32.066+15.9994*4)+5*(1.00794*2+15.9994) = 249.686 and display task and results Since the relative atomic weight of cooper given above only has 3 decimal place, accuracy cannot be determined beyond that point. Here are the sample tasks: 8.12E-5/2 = 0.0000406 sin1.5 = 0.9975 log(20*5) = 2 5! = 120 15%60 = 9 x^2 + x - 7 = 0 = x1 = 2.19; x2 = -3.19 H2SO4 = H*2+S+O*4 = 1.00794*2+32.066+15.9994*4 = 98.079 cuso4+5h20 = (CuSO4)+5*(H20) = 260.4036 104.4/(mn(no3)2+6h2o) = 104.4/(Mn(NO3)2+6*(H2O)) = 0.3637
