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MacFormula 2.0
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MacFormula 2.0.rsrc
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HTXT_3_Normal Usage_
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MacFormula is very easy to use. Just choose the
radio button(s) corresponding to what features you want,
type in your formula, and then hit either the button
labeled “Calculate”, or hit a <CR> or <ENTER>. You may
also enter a value into the Milligrams box, but this
is optional.
MacFormula does some of its own error checking,
and will usually let you know when you are doing something
wrong. If you are consistently getting errors, make sure
you are doing the following:
• Elements must begin with an UPPERCASE letter and,
in the case of two-letter symbols, the second letter
must be lowercase.
• User-defined symbols must be defined. That is, do
not forget to define the symbol you are using.
• Do not use the <CR> or <ENTER> keys as a substitute
for pressing the “Calculate” button with the mouse when
your formula is either hilited, or when the blinking
cursor is not at the end of your formula.
Finding milligrams or millimoles
By default, MacFormula allows you to input a value
for the number of milligrams of a substance you are working
with. Hitting the “Calculate” button will then find the
formula weight and number of millimoles simultaneously
(Presuming you have entered a formula, of course). If you
want to find milligrams instead, click on the word
“Milligrams” to toggle this function. You’ll see what I
mean when you try it.
Elemental Analysis
The only requirement for doing an elemental analysis is
that you first input a formula and calculate the formula
weight. If you are using user-defined symbols such as
Me(thyl), Ph(enyl), etc., you will have to write these as
their elemental equivalents beforehand if you plan on
finding the % Carbon, etc. Knowing the % Phenyl is not
going to help you, is it?