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There is an oxygen cylinder with a volume of 10L, which contains oxygen with a density of 2.5kg/m & sup3; and what is the density of the remaining oxygen in the cylinder when 15g oxygen is used in a certain rescue
10L = 0.01m3
The original mass of oxygen = 0.01 * 2.5 = 0.025kg = 25g
Residual mass = 25-15 = 10g = 0.01kg
Residual density = mass / volume = 0.01/0.01 = 1kg / M & sup3;
When an oxygen cylinder is used, the gas density in the oxygen cylinder is p. after 2 / 3 mass of oxygen is used, what is the oxygen density in the cylinder?
The oxygen in the oxygen bottle is liquid
There is a certain mass and density of oxygen in the oxygen cylinder. If some oxygen is used up again, will the remaining oxygen density change?
emergency
Because the volume does not change, the mass becomes smaller: ρ = m / V, V does not change, m ↓, so ρ ↓ changes
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