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July 21, 2025, 08:11:00 pm
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Author Topic: 2009 VCAA significant figures...  (Read 728 times)  Share 

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meli001

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2009 VCAA significant figures...
« on: June 02, 2011, 10:11:32 pm »
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In Q3 short answer part B, the assessment report rounds off the answer to 2 significant figures but no where in the question is there a measurement with less than 3 signifcant figures.

Am I missing something here? Because I'm pretty sure VCAA don't stuff up their reports... T.T

Oh and how's everyone going with their practise exams?
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luken93

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Re: 2009 VCAA significant figures...
« Reply #1 on: June 02, 2011, 10:24:17 pm »
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n(HCl) remaining = 0.100 – 0.0200
= 0.080 mol
c(HCl) = 0.080* (M)

The reason for this is that when adding/subtracting, the answer is rounded to the least number of DECIMAL PLACES rather than significant figures, which in this case was 3 decimal places in 0.100

Multiplication/Division = Sig Figs, Adding/subtracting = Decimals
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2010: Business Management [47]
2011: English [44]   |   Chemistry [45]  |   Methods [44]   |   Specialist [42]   |   MUEP Chemistry [5.0]   |   ATAR: 99.60
UMAT: 69 | 56 | 82 | = [69 / 98th Percentile]
2012: MBBS I @ Monash

meli001

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Re: 2009 VCAA significant figures...
« Reply #2 on: June 02, 2011, 10:27:47 pm »
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Oh really? I didn't know that... thanks a million :)
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