I am desperately trying to stay ahead in my chemistry class and need help
Were are currently working on scientific notation and I somewhat get it but am still confused.
I get lost sometimes when I try putting it into expanded form and where the decimal goes
And also scientific notation with significant figures I don't understand when zeros are significant figures or how to use scientific notation
Any advice/tips or help you can give about scientific notation and sig figs would be much appreciated thank you

This is a good start - Significant figures - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Significant_figures)