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March 6, 2015

March 6, 2015

Posted by **Lizy** on Thursday, May 1, 2008 at 6:37pm.

- Chem HW Help! -
**DrBob222**, Thursday, May 1, 2008 at 7:09pmI just remember two gas laws. The general one is PV = nRT. The other one is

P1V1/T1 = P2V2/T2 which I use when no number of mols is given.

I also remember that 1 mol of a gas at STP occupies 22.4 L.

Nothing to combine that way. But if you will post a specific question, perhaps we still can help.

- Chem HW Help! -
**Lizy**, Thursday, May 1, 2008 at 7:46pmThe gas law that I'm refering to is P1v1/T1=P2V2/T2. The question that I have to answer is:

P1V1/T1=P2V2/T2

P1

600 mm Hg = an answer in the blank bok that I was not able to provide.

atm (round to hundredths place)

V1

24 mL = an answer in the blank bok that I was not able to provide.

L (round to thousandths place)

T1

18 °C = an answer in the blank bok that I was not able to provide

K

P2

430 mm Hg = an answer in the blank bok that I was not able to provide

atm (round to hundredths place)

v2 = ? with an answer that is suppose to be placed in a black box underneath the v1.

L (round to thousandths place)

T2

24 °C = an answer in the blank bok that I was not able to provide.

K.

- Chem HW Help! -
**DrBob222**, Thursday, May 1, 2008 at 8:38pmThe gas law that I'm referring to is P1v1/T1=P2V2/T2. The question that I have to answer is:

P1V1/T1=P2V2/T2

P1

600 mm Hg = an answer in the blank bok that I was not able to provide.

atm (round to hundredths place)

**The question wants you to convert mm Hg pressure to atmospheres. The conversion factor is 1 atm = 760 mm Hg. So 600/760 = ?? atm.***For what it's worth, pressure can be in any unit, with this formula, as long as you keep the units consistent; i.e., if you use P1 in atm then P2 must be in atm or if you use P1 in mm Hg then P2 must be in mm Hg.*

V1

24 mL = an answer in the blank bok that I was not able to provide.

L (round to thousandths place)**The question wants you to convert 24 mL to liters. You know that 1000 mL = 1 L. You convert by 24 mL x (1 L/1000 mL) = ??**

T1

18 °C = an answer in the blank bok that I was not able to provide

K**Kelvin = 273 + C**

P2

430 mm Hg = an answer in the blank bok that I was not able to provide

atm (round to hundredths place)**Converted the same say as P1 above.**

v2 = ? with an answer that is suppose to be placed in a black box underneath the v1.

L (round to thousandths place)**I assume you are to calculate V2 since you have all but that one number.**

T2

24 °C = an answer in the blank bok that I was not able to provide.**Kelvin = 273 + C.**

K.

**This is more a question of how to use conversion factors than it is a question a gas laws.**

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