Astronauts land on another planet and measure the density of the atmosphere on the planet surface. They measure the mass of a 500 cm³ conical flask plus stopper as 457.23 g. After removing the air, the mass is 456.43 g (1 m³ = 1000 litres). What is the best estimate of the density of the air?

(A) 0.000 001 6 kg/m³
(B) 0.0016 kg/m³
(C) 0.16 kg/m³
(D) 1.6 kg/m³​