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If there is a 10 DM3 oxygen cylinder with a density of 2.5 kg / m3, what is the density of residual oxygen if 5 g is used at one time? This is a physical problem, please help!
The density of raw oxygen is 2.5kg/m3 = 2.5g/dm3
Raw oxygen mass = 2.5g/dm3 * 10dm3 = 25g
Current oxygen mass = 25g-5g = 20g
Current oxygen density = 20g / 10dm3 = 2G / dm3 = 2kg / m3
The hospital has an oxygen cylinder with a volume of 10dm3, which contains oxygen with a density of 2.5kg/m3. When 5g oxygen was used for the last rescue, what is the density of the remaining oxygen in the cylinder?
From ρ = MV, the original mass of oxygen is M1 = ρ 1V = 0.01m3 × 2.5kg/m3 = 25 × 10-3kg = 25g; the mass of remaining oxygen is M2 = 25g-5g = 20g, and the density of remaining oxygen is ρ 2 = m2v = 20g0.01m3 = 2000g / m3 = 2kg / m3. A: the density of remaining oxygen in the bottle is 2kg / m3
Half of the oxygen in the oxygen cylinder is used up, does the density change (urgent)
Same volume, half mass,
Half the density
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