Density Lab B

UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

Re: Density Lab B

Postby UTF-8 U+6211 U+662F » October 4th, 2018, 8:17 pm

Do any of you know if there are any practice tests for Density Lab?
syo_astro's SSSS test on the test exchange

(although there were rule changes between now and then)

Incineroar999
Member
Member
Posts: 11
Joined: October 15th, 2018, 12:42 pm
Division: B

Re: Density Lab B

Postby Incineroar999 » October 15th, 2018, 12:48 pm

Is this event math related?

UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

Re: Density Lab B

Postby UTF-8 U+6211 U+662F » October 15th, 2018, 1:01 pm

Is this event math related?
Yes. Very. Although nothing complicated, more like multiplication and division.

gl10086
Member
Member
Posts: 7
Joined: September 28th, 2018, 5:21 am

Re: Density Lab B

Postby gl10086 » October 15th, 2018, 2:20 pm

Are there certain tools or materials I need to know how to use for this event?
"Everyone is weird. If you're not weird, you're weird." -Me

Yellow is the best color ever.

Everything is awesomesauce!

Peace out. 8-)

MattChina
Member
Member
Posts: 224
Joined: February 12th, 2017, 8:06 am
Division: B
State: NY
Location: somewhere over the rainbow

Re: Density Lab B

Postby MattChina » October 15th, 2018, 6:02 pm

Are there certain tools or materials I need to know how to use for this event?
Probably just know how to use a ruler or read a graduated cylinder.
2019 events: Water Quality, Battery Buggy, Elastic Launch Glider, Density Lab, Circuit Lab, Thermodynamics
R.C Murphy Co-Captain
Dank Memes Area Homeschool Team member

Incineroar999
Member
Member
Posts: 11
Joined: October 15th, 2018, 12:42 pm
Division: B

Re: Density Lab B

Postby Incineroar999 » October 29th, 2018, 12:18 pm

Does anyone know what materials we need for the density lab?

UTF-8 U+6211 U+662F
Exalted Member
Exalted Member
Posts: 1518
Joined: January 18th, 2015, 7:42 am
Division: C
State: PA

Re: Density Lab B

Postby UTF-8 U+6211 U+662F » October 29th, 2018, 1:56 pm

Does anyone know what materials we need for the density lab?
A binder, writing materials, and calculators

User avatar
bobthebuilderman
Member
Member
Posts: 24
Joined: January 28th, 2018, 11:15 am
Division: B
State: CA
Location: oOOOOooOooOooOo

Re: Density Lab B

Postby bobthebuilderman » October 29th, 2018, 3:58 pm

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
yes

User avatar
Unome
Moderator
Moderator
Posts: 4108
Joined: January 26th, 2014, 12:48 pm
Division: Grad
State: GA
Location: somewhere in the sciolyverse

Re: Density Lab B

Postby Unome » October 29th, 2018, 6:01 pm

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
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 post
Userpage
Chattahoochee High School Class of 2018
Georgia Tech Class of 2022

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.

User avatar
John Richardsim
Wiki Moderator
Wiki Moderator
Posts: 730
Joined: February 26th, 2014, 10:54 am
Division: Grad
State: MI
Location: Robinson Twp.

Re: Density Lab B

Postby John Richardsim » October 29th, 2018, 8:04 pm

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
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.
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).

If in doubt, be sure to state the specific conditions for STP that you are using.
Si Quaeris Peninsulam Amoenam Circumspice


Return to “2019 Lab Events”

Who is online

Users browsing this forum: No registered users and 0 guests