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AS chemistry Uncertainty Question

A measuring cylinder has an uncertainty of ± 5 cm
What is the minimum volume of liquid that can be measured if the percentage error in
the volume is to be less than 0.20%?

A 0.025 dm3
B 0.25 dm3
C 2.5 dm3
D 25 dm3

The answer is C
I don't even know how am I suppose to approach this question!
(Apparatus uncertainty/Reading on apparatus) x 100 = Percentage apparatus error

Convert cm3 to dm3, and remember that larger readings have less uncertainty. So you need to sub in uncertainty and percentage error of 0.2, then rearrange for reading = volume of liquid.
Reply 2
Avatar for cofstern
cofstern
7
image-417419c0-c012-4956-a1e0-3a93e9e82de97343186537960146356-compressed.jpg.jpeg
Reply 3
Avatar for tjsgnwjs
tjsgnwjs
OP
11
Okay thanks!
Original post by MrMoment
(Apparatus uncertainty/Reading on apparatus) x 100 = Percentage apparatus error

Convert cm3 to dm3, and remember that larger readings have less uncertainty. So you need to sub in uncertainty and percentage error of 0.2, then rearrange for reading = volume of liquid.
Reply 4
Avatar for tjsgnwjs
tjsgnwjs
OP
11
Forgot to convert it into dm3 :tongue: anyways thanks!!
Original post by ruomin02
image-417419c0-c012-4956-a1e0-3a93e9e82de97343186537960146356-compressed.jpg.jpeg

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