syo_astro's SSSS test on the test exchangesomeone1580 wrote:Do any of you know if there are any practice tests for Density Lab?
(although there were rule changes between now and then)
Density Lab B
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Re: Density Lab B
(although there were rule changes between now and then)
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Re: Density Lab B
Yes. Very. Although nothing complicated, more like multiplication and division.Incineroar999 wrote:Is this event math related?
Re: Density Lab B
Are there certain tools or materials I need to know how to use for this event?
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MattChina
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Re: Density Lab B
Probably just know how to use a ruler or read a graduated cylinder.gl10086 wrote:Are there certain tools or materials I need to know how to use for this event?
2019 events: Water Quality, Battery Buggy, Elastic Launch Glider, Density Lab, Circuit Lab, Thermodynamics
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Re: Density Lab B
A binder, writing materials, and calculatorsIncineroar999 wrote:Does anyone know what materials we need for the density lab?
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bobthebuilderman
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Re: Density Lab B
What is 1 mol of gas at STP equal too?
The wiki says that its 22.71 L. https://scioly.org/wiki/index.php/Densi ... ro.27s_Law
Simply looking it up, says its 22.4 L.
Which do I believe?
Thanks,
Bob
The wiki says that its 22.71 L. https://scioly.org/wiki/index.php/Densi ... ro.27s_Law
Simply looking it up, says its 22.4 L.
Which do I believe?
Thanks,
Bob
yes
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Re: Density Lab B
22.4 L / mol is the value for an ideal gas (calculated from PV=nRT). A calculation that better approximates a real gas, such as the van der Waals equation, may have a different value - I suspect that's where 22.71 comes from. In general, I would recommend using 22.4 since it's more commonly cited. see the next postbobthebuilderman wrote:What is 1 mol of gas at STP equal too?
The wiki says that its 22.71 L. https://scioly.org/wiki/index.php/Densi ... ro.27s_Law
Simply looking it up, says its 22.4 L.
Which do I believe?
Thanks,
Bob
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Re: Density Lab B
The 22.71 L/mol uses 1 bar for STP (used by IUPAC since 1982), whereas 22.41 L/mol uses 1.01325 kPa for STP (used before 1982).Unome wrote:22.4 L / mol is the value for an ideal gas (calculated from PV=nRT). A calculation that better approximates a real gas, such as the van der Waals equation, may have a different value - I suspect that's where 22.71 comes from. In general, I would recommend using 22.4 since it's more commonly cited.bobthebuilderman wrote:What is 1 mol of gas at STP equal too?
The wiki says that its 22.71 L. https://scioly.org/wiki/index.php/Densi ... ro.27s_Law
Simply looking it up, says its 22.4 L.
Which do I believe?
Thanks,
Bob
If in doubt, be sure to state the specific conditions for STP that you are using.
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