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i dont know how to use the power function here ...

You can write it by using <sup>text</sup>
For example: 1023

Thank you :). And about the number of molecules, i was contemplating till now and realized what you meant. But here in our country, we're taught that the base of Avogadro's no is 6.023 and not 6.022. This was in high school and it's still embedded in me. And again Thank you and will keep an eye out for your contests. CHEERS!