For an oxygen cylinder, the density of the gas in the cylinder is ρ 0 when it is just started. After 13 mass of oxygen is used, the density of the oxygen in the cylinder is () A. ρ0B. 13ρ0C. 23ρ0D. 2ρ0

From the meaning of the title, when the oxygen in the oxygen cylinder is used up to 13, the mass becomes two-thirds of the original, and the volume remains unchanged. From ρ = MV, ρ = 23mv = 23 ρ 0

RELATED INFORMATIONS

1. 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
2. Half of the oxygen in the oxygen bottle is used and the density becomes half of the original because the volume remains unchanged. But why does the volume remain unchanged
3. How to measure the density of edible oil
4. How to measure the density of edible oil Just use an empty bottle and a balance for water and oil The bottle has no scale, the balance has weight
5. Is edible oil dense or is water dense
6. The volume of oxygen required for complete combustion of ethylene and acetylene is 2 or 7 times that of the original mixture The volume of hydrogen consumed in total addition reaction is twice that of the original gas mixture In addition, is ethane produced by the addition of acetylene and hydrogen here
7. 10 ml of gaseous hydrocarbon was fully burned in 50 ml of oxygen, and liquid water and 35 ml of mixed gas were obtained I figured out that there are 6 h, so how can I determine the number of C The answer is C2H6 and C3H6 I have C4H6, too. C2H6 and C3H6
8. Under the same temperature and pressure, 10ml of a gaseous hydrocarbon is fully burned in 50ml of oxygen to obtain liquid water and 35ml of mixed gas. What is the molecular formula of the hydrocarbon?
9. The relationship between Q1 and Q2 is () A. Q1 > Q2B. Q1 < q2c. Q1 = q2D
10. If a certain amount of hydrogen combustion product is gaseous water and the product is liquid water, will the heat generated be the same
11. 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!
12. The density of oxygen contained in a steel cylinder is 8 kg / m3. If one quarter of the oxygen is used for one welding, the density of the remaining oxygen in the cylinder is 0
13. For a certain mass of gas, its density p is the inverse proportional function of its volume V. When v = 10 cubic meters, P = 1.291 1. Finding the functional relationship between P and V 2. If v = 6.45M & # 179, the density of the gas can be obtained
14. When v = 10m3, ρ = 1.43kg/m3, then the functional relationship between ρ and V is______ ．
15. There is a steel cylinder with oxygen of mass m and density ρ. When oxygen of mass m / 4 is used, the remaining gas density in the cylinder is 0
16. If a certain amount of oxygen is contained in a steel cylinder, and 1 / 3 of it is used in one welding, the mass of the remaining oxygen in the cylinder is the same as the original______ Times the original density______ Times
17. The oxygen contained in a steel cylinder is 8kg / m3. If a quarter of it is used in one welding, what is the density of the remaining oxygen in the cylinder Kilogram per cubic meter? Isn't density a property of matter? Why not 8?
18. How many grams of oxygen can be produced by heating 15.8 grams of potassium permanganate to decompose it completely? What is the volume of oxygen under standard conditions (density is 1.429 g / L)?
19. The volume ratio of nitrogen to oxygen in air is about 1:4. It is known that under the standard condition, the density of nitrogen is 1.250 g / L-1, and that of oxygen is 1.429 g / - 1, Calculate the mass ratio of nitrogen and oxygen in air
20. It is known that the density of oxygen is 1.429g/l and that of air is 1.293g/l. The mass fraction of oxygen in air (density = mass / volume) is calculated