Calculating Gram Formula Weights

Usage

• To begin-press "New Compound" and a chemical formula will appear to the right of the table.
• Calculate the gfw,enter it in the answer cell and press "Check Answer."
• The results on the problem and a running total will appear in the second table.
• If you get a problem "incorrect", you should redo it and recheck your answer.
• For ease of presentation, all gfws are presented to four significant figures, even though the gaws are oftem known to greater precision than that.
• If you miss a problem three times, pressing the "Show Answer" button will cause a complete solution to appear.