1)If a student used a balance that always reads 0.1 g more than the real mass, h
ID: 529998 • Letter: 1
Question
1)If a student used a balance that always reads 0.1 g more than the real mass, how will his/her experimental result be affected in Chemical Measurement lab?
The water density will be lower than that when a good balance is used.
2)The molar mass of butane (C4H10) should be 58 g/mol (as calculated from periodic table). If a student measured the molar mass of butane to be 67, what is the % error of the measurement? Use no decimal place, such as "5", or "13".
3)How many sig figs should the result of the following have? All Xs are digits that are purposefully not given, not multiplication signs; the * is the multiplication sign.
1.2XX5*(13.XX - 10.XX)
The systematic error should not affect the experimental result because it will be canceled by subtraction when calculating the mass differences of successive weighings.Explanation / Answer
ans 1. a) The systematic error should not affect the experimental result because it will be cancelled by subtraction when calculating the mass differences of successive weighings.
It a systematic error , that increases or decreases the value but not both .
An experiment may involve more than one such systematic errors made by the same instrument such that the errors will nullify each other in successive weighings .
Hence the result will not be affected.
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