Chemistry question?

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A student calculates the density of iron as 6.80 g/cm^3 using lab data for mass and volume. A handbook reveals that the correct value is 7.86 g/cm^3. What is the percent error?
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2006-09-21 14:18:42 · 3 answers · asked by Lion 1 in Science & Mathematics ➔ Chemistry

3 answers

% error is the absolute difference between theoretical and actual divided by the theoretical times 100

% error = |Mt-Ma|/Mt x 100

Mt = 7.86
Ma = 6.80

2006-09-21 14:40:25 · answer #1 · answered by Jake S 5 · 0⤊ 0⤋

the value of % error is always absolute
%error=((experimental value-theoretical value)/theoretical value)x100
%error=((6.80-7.86)/7.86)x100 = 13.47 %

best answer?

2006-09-22 05:09:23 · answer #2 · answered by teroy 4 · 0⤊ 0⤋

as above

2006-09-23 08:21:02 · answer #3 · answered by Anonymous · 0⤊ 0⤋