How do I go about solving these problems and what formulas do I need to use to s

ID: 883118 • Letter: H

Question

How do I go about solving these problems and what formulas do I need to use to solve these problems?

1- A gas occupies 30 L at 760 mm Hg. What is its volume at 350 mm Hg?

2- A gas occupies 500 mL at 1 atm. What is its pressure if the volume becomes 1500 mL?

3- If a gas occupies 250 mL at 25°C, what will its volume be at 57°C?

4- What was the original temperature of a 2 L sample of gas if it initially had the volume 5 L at 27°C?

5- At what pressure would 100 mL of a gas be found if it began at 500 mL at 2.5 atm?

6- What is the volume of a gas at 275 mm Hg if it occupied 750 mL at 1000 mm Hg?

7- A gas occupies 60 L at 250°K and 1 atm. What is its volume at 250°C and 1.5 atm?

8- What is the final temperature in Celsius of a gas occupying 3.25 L at 750 mm Hg if it occupied 2250 mL at
37°C and 600 mm Hg?

9- How great a temperature change occurs for a gas at 350 mm Hg and 220 L if it occupied 500 L at 0°C and
700 mm Hg?

10- 750 mL of a gas at 127°C and 800 mm Hg would occupy what volume at STP

1) its a application for boyls law
P1 x V1 = P2 x V2
760 x 30 = 350 x V2
V2 = 22,800 ÷ 350
New Volume (V2) = 65.14 L

2) same again boils law

1 x 500 = p x 1500
p = 3 atm

3) use charless law

250/ 298 K = V / 330 K
V = 278.9 mL

4) again charless law

5 / 300 K = 2 / T
T = 120 K

5) again boils law

2.5 x 500 = p x100
p = 12.5 atm

similarly try the other problems

all are related to gas law equations

in each case they gave three values we need to find out the fourth value

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