MOLWT

Type: Function

Description: Returns the molecular weight for the specified molecular formula. It takes the formula as a string (such as "H2O") or name (with certain restrictions, such as 'H2O'). It returns the molecular weight. It chooses to use or not use units according to the Units Usage flag (flag 61: SI units if clear, no units if set).

You can store a molecular formula in a variable, then use the variable name with MOLWT. You should do this when you want to use MOLWT in an expression and the formula contains parentheses or matches a command name. You must take care when naming a variable that contains a formula string or name. Make sure the variable name isn’t a valid formula — for example, start the variable name with a lowercase letter. (If the variable name is a valid formula, using MOLWT with the variable name returns the molecular weight for the variable name, not for the formula it contains.)

Access:

GPERIODIC TABLE MOLWT

 

 

Flags:

Units Usage (61)

 

 

Input/Output:

 

 

 

 

 

 

 

 

 

 

 

Level 1/Argument 1

 

Level 1/Item 1

 

 

 

 

 

 

 

'name'

→

x or x_unit

 

 

“string”

→

x or x_unit

 

The command

 

 

Example 1:

sequence "CH3C6H2(NO2)3" MOLWT returns

 

 

'227.133_g/gmol' when flag 61 is clear.

 

 

Example 2:

The command sequence 'C12H17ClN4OS' MOLWT returns 300.8055 when flag 61

 

is set.

 

 

See also:

PERINFO, PERTBL, PTPROP

 

 

 

 

 

 

 

MROOT

Command

 

 

Type:

 

 

Description:

Multiple Roots Command: Uses the multiple-equation solver to solve for one or more variables

 

using the equations in EQ. Given a variable name, MROOT returns the found value; with "ALL"

 

MROOT stores a found value for each variable but returns nothing.

 

Access:

…µMROOT

 

 

Input/Output:

 

 

 

 

 

 

Level 1/Argument 1

 

Level 1/Item 1

 

 

 

 

 

 

 

'name'

→

x

 

 

"ALL"

→

 

 

 

 

 

 

See also:

MCALC, MUSER

 

 

 

 

 

 

 

MSGBOX

Command

 

 

Type:

 

 

Description:

Message Box Command: Creates a user-defined message box.

 

MSGBOX displays “message” in the form of a standard message box. Message text too long to appear on the screen is truncated. You can use spaces and new-line characters (…Ë) to control word-wrapping and line breaks within the message.

Program execution resumes when the message box is exited by selecting OK or CANCL.

Access: !°LOUT MSGBOX ( °is the left-shift of the Nkey).

Full Command and Function Reference 3-151