AS Chemistry Formulae
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Percentage uncertainty formula
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Percentage error formula
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Total percentage uncertainty method
Add up all uncertainties of individual apparatus
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Multiple readings uncertainty method
e.g. finding initial and final mass or temperature
DOUBLE the absolute uncertainty e.g. (2×±0.05)/25.00
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Dividing or multiplying measurements uncertainty method
e.g. finding rate of reaction (rate=vol/time)
add together percentage uncertainties
THEN calculate absolute uncertainty from sum of percentage uncertainties
Note 
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