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Would this score me 1 mark

The question is The cylinder is taken to high altitude where the temperature is −50 °C and the
pressure is 3.6 × 104
Pa. A valve on the cylinder is opened to allow gas to
escape.
Calculate the mass of gas remaining in the cylinder when it reaches
equilibrium with its surroundings.
Give your answer to an appropriate number of significant figures.

If I got all the working out wrong but I put it to 2 sf would I get a mark as it states in the mark scheme any 2 sf answer gets the mark:

(V2 = P1 V1 T2 / P2 T1)
V2 = 1.6 × 106
× .200 × (273 – 50) / 3.6 × 104
× (273 + 22) or 6.7(2) (m3
)
allow ecf from bii
[reminder must see bii]
look out for
mass remaining = 5.61 × 0.20 / 6.72 = 0.17 (kg) (0.167 kg)
or
n = (PV / RT = 3.6 × 104
× 0.200 / (8.31 × (273 − 50)) = 3.88(5) (mol)
mass remaining = 3.885 × 4.3 × 10−2 = 0.17 (kg)
2 sig figs
any 2 sf answer gets the mark