In the following equations you will see a blank box before the symbol of each compound and element. Enter the lowest possible number in each box, or leave the box blank if you think the chemical needn't have a number (i.e. the number is equivalent to '1').
When you think the equation is balanced, click on the small button "Check answer" that appears below it.
If your equation is incorrect, then click the button "Reset" and try balancing the equation again.
In case you are in a hurry or are unable to balance, then click the button "Show answer."
If you want to know the time taken (minutes:seconds) to balance a chemical equation, you click the "Start" button and after balancing the equation, click the "Stop"button. Once, you have noted the time, click the "Reset Timer" button.
Note:
If you get no response after clicking 'Check answer' or 'Show answer', your browser has disabled to run this program. Enable it by clicking below the 'address bar' and follow the instructions.
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