Question

Please help fast

Answer 1

Moles of Oxygen they took in : C. 2.42

Further explanation

The gas equation can be written  

$\large{\boxed{\bold{PV=nRT}}}$

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08205 l.atm / mol K  

T = temperature, Kelvin  

P=1000 kPa

V = 6 L

T = 298 K

moles of Oxygen :

$\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1000\times 6}{8.31\times 298}\\\\n=2.42~moles$