Saturday

April 18, 2015

April 18, 2015

Posted by **Chelsey** on Wednesday, February 26, 2014 at 6:46pm.

a. Use Boyle’s law to calculate the new pressure if the temperature is held constant and the volume is increased to 6.54 L.

torr

b. Use Gay-Lussac’s law to calculate the new pressure if the volume is held constant and the temperature is decreased to 6.00°C.

torr

c. Use Charles’ law to calculate the new volume if the pressure is held constant and the temperature is increased to 210°C.

L

d. Use the combined gas law to calculate the new pressure if the temperature is decreased to 25.0°C and the volume is increased to 16.9 L.

torr

e. Use the ideal gas law to calculate the number of moles of gas that are present.

Moles

A= p1v1=p2v2

725(3.44)=?(6.54) = 381.45

B. p1t1=p2/t2

725(6.00)/37.0. = 117.567

C= v1t1=v2t2

3.44(210)/37.0= 19.524

D= p1v1t1=p2v2t2

725*3.44/37.0=?(16.9)/25.0 = 45.566

E..?

I keep getting b,c,d,e wrong but I don't know what I'm doing wrong

- Chemistry help! -
**DrBob222**, Wednesday, February 26, 2014 at 9:46pm2 errors on B

1. should be p1/t1 = p2/t2

2. T must be in kelvin and you used C

3. Ans is about 652.

(725/310) = (p2/279)

C.wrong formula.

v1/t1 = v2/t2

(3.44/310) = v2/210)

Ans is approx 2.3 L

d.formula is (p1v1/t1) = (p2v2/t2)

(725*3.44/310) = p2*16.9/298).

Ans is approx 142.

e. PV = nRT

725*3.44 = n*0.0821*310

Solve for n.

**Answer this Question**

**Related Questions**

chemistry - A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and ...

chemistry - A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and ...

chemistry - A fixed quantity of gas at 27°C exhibits a pressure of 729 torr and ...

Chemistry - 1. Calculate the number of molecules in a deep breath of air whose ...

Gas Law Chemistry - I need help on these two questions: If a certain gas ...

Chem hw! - 1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...

Chem hw! - 1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...

chemistry - A sample of ideal gas at room temperature occupies a volume of 32.0L...

chemistry - A sample of neon gas used in a neon sign occupies a volume of 3.90 L...

AP Chemistry - Suppose that a sample of gas occupies 140 mL of volume at 25C ...