Ch 10 HW ERT/PEREZ > Activities and Due Dates > Ch 10 HW 2096/2500 Resources G...

Question

Question

Answer 1

Answer #1

Answer

122.09g

Explanation

Number of moles of Ar is determined by Ideal gas equation

PV=nRT

P = Pressure , 5.41atm

V = Volume , 6.42L

n = number of moles

R = gas constant , 0.082057(L atm /mol K)

T = Temperature , 17.3℃ = 290.45K

n = PV/RT

= 5.41atm× 6.42L / ( 0.082057( L atm/mol K) × 290.45K)

= 1.457mol

mass = number of moles × molar mass

mass of Ar = 1.457 × 83.798g/mol = 122.09g

Answer 2

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