Okay in an example problem for Charles Law, my teacher had the information;
T1 = 317 K
V1 = 250 cm^3
T2 = 273 K
V2 = ??
When she put all the information in the equation she go the answer
V2 = 215.2996845 cm^3
But then she changed it to 220 cm^3
Could someone just explain to me how and why she did this?

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Well thank you. I didn't think it made any sense either.

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