previous 8 of 14 I n Part A A balloon is floating around outside your window. Th

Question

previous 8 of 14 I n Part A A balloon is floating around outside your window. The temperature outside is 3 °C, and the air pressure is 0.700 atm. Your neighbor, who released the balloon, tells you that he filled it with 4.20 moles of gas. What is the volume of gas inside this balloon? Express your answer to three significant figures and include the appropriate units Hints Vualom- Value Units Submit My Answers Give Up Part B A 120 L gas cylinder is filled with 9.40 moles of gas The tank is stored at 37 ec what is the pressure in the tank? Express your answer to three significant figures and include the appropriate units. Hints Submit My Answers Give Up Part C 12/1/2017

Explanation / Answer

All the questions are based on ideal gas equation.

where P is the pressure

V is the volume

n is the number of mles

R is the universal gas constant, value = 8.314 J/mol K or 0.082 Latm /K

T is the temperature in kelvin

Question-1

given data from question,

Temperature, T = 3 0 C = 3+273=276 K

air pressure, P =0.700 atm

number of moles, n = 4.20 moles

Now,volume of gas , V=?

PV= nRT

V= nRT/ P

=(4.20 x 0.082 x 276)/0.700 = 135.792 litter.

Question-2

V= 12.0 L

n=9.40 moles

T= 370 C = 37+273 = 310K

R= 0.082 L atm / K

PV= nRT

P = nRT/V

= (9.40 x 0.082 x 310 ) / 12.0 = 19.9124 atm

Question-3

V= 280L

T= 8250C +273 = 1098 K

P = 1.050 atm

n=?

PV= nRT

n= PV/ RT

= (1.050x280)/(0.082 x 1098)

=3.2653 moles

Question-4

V= 16.0 L

n= 6.40 moles

P = 5 atm

T=?

PV = nRT

T= PV/nR

=(5 x 16.0) / (6.40 x 0.082)

=152.439 K

i hop you got the answers.

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