Chemistry Problems?

Question

1)What is volume at standar pressure(STP), original v=10.0 L at a pressure of 500. mmhg


2)Gas occupies V=457.7 ml at 0 degrees C, what will volume be at 28 degrees C


3) Pressure is 4.50 atm at 20 degrees C. Pressure increases to 4.8 atm. What is the temperature in celcius.


4) Gas measures 1.75 L at -23 degrees celcius and 1.50 KPA. What temperature will gass occupy when V=1.30L at 2.10 KPA


5) V= 350 ml at 27 degrees C. 810 mmhg. What is volume at -3.00 degrees C and 650. mmhg.


6) What volume will .500 moles of 02 occupy at 25 degrees celcius and .520 atm?


7) Cylinder has 25,000 ml of He at 22 degrees C and 5.60 atm. How many grams of He are in the cylinder?


8) Sn + Hf---> SnF2 + H2 How many Liters of HF are needed to produce 14.2g of H2 (assume STP)3


9) At 17.5 degrees C and 740 mmhg, 11.5 g of Na reacts with H20. How many liters of H2 are produced. (Change water to H0H)
Thanks sooo much!!

Answer 1

All of your problems are solved using the combined gas law equation.

P1 V1 / T1 = P2 V2 / T2

STP is at zero Celsius (273 K) and 1 atm. pressure

Don't forget to convert Celsius temperatures to Kelvin.

Just plug n your various problems to this equation and you have it.