If the vapor's volume were to be incorrectly recorded as 125ml, how will this error affect the calculated molar mass of the unknown?

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Chemistry

Alena

17 February, 21:31

If the vapor's volume were to be incorrectly recorded as 125ml, how will this error affect the calculated molar mass of the unknown?

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Rey Small · Answer 1

Since you didn't give the actual volume (or any of the experimental values) I can only tell you how to do it. Do the calculation using the real (determined) volume of the flask. Then, re-do the calculation with v = 125ml. Take the two values and calculate % error; m = measured vol; g = guessed vol.

[mW (m) - mW (g) ]/mW (m) x 100%

(they want % error so, if it is negative, just get rid of the sign)