Basically, I have to find the number of atoms in a 4.33 g sample of C6H6.
The number of molecules is 33.4e+21, and there are 12 atoms in each molecule of C6H6. So I just multiply the two to get:
400.8e+21.
Now I have to check my significant figures, and I need to use 2 significant figures, right (because 12 is 2 significant figures and the most uncertain, and I was taught to always use the most uncertain number of significant figures in a calculation)? So it'd be 40e+22... but the website is saying that I'm wrong and it's telling me to check my significant figures? What'd I do?
The number of molecules is 33.4e+21, and there are 12 atoms in each molecule of C6H6. So I just multiply the two to get:
400.8e+21.
Now I have to check my significant figures, and I need to use 2 significant figures, right (because 12 is 2 significant figures and the most uncertain, and I was taught to always use the most uncertain number of significant figures in a calculation)? So it'd be 40e+22... but the website is saying that I'm wrong and it's telling me to check my significant figures? What'd I do?
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12 is what you would call an "exact" number. This is something like saying 24 hours in one day, or 60 seconds in a minute. You could say there are 24.00 hours in a day or 60.000000 seconds in minute.
There should be 3 significant figures in your answer.
Oh and scientific notation is from 1 to 9.99 .. Maybe that's where you are messing up too.
There should be 3 significant figures in your answer.
Oh and scientific notation is from 1 to 9.99 .. Maybe that's where you are messing up too.