![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
The volume ratio of oxygen and nitrogen in the air is 21:78. How many cubic meters of oxygen and nitrogen are there in 660 cubic meters of air?
660 × 2121 + 78 = 660 × 2199 = 140 (cubic meters); 660 × 7821 + 78 = 660 × 7899 = 520 (cubic meters); answer: 660 cubic meters of air contains 140 cubic meters of oxygen and 520 cubic meters of nitrogen
Combustion of carbon in oxygen and air
Don't know what is fire light, just tell me the color and difference of fire
Full combustion of carbon in oxygen: C + O2 = ignition = CO2
Phenomenon: (1) white light (2) heat
The phenomenon of burning in air, red heat
Solid combustion is fire light, liquid and gas combustion produce flame
RELATED INFORMATIONS
- 1. What are the combustion phenomena of carbon in air and oxygen?
- 2. How many kilograms of ozone can one kilogram of oxygen produce? How much air can one kilogram of oxygen be produced?
- 3. The air density is 1.293g/l and the oxygen density is 1.429g/l. According to the volume fraction of oxygen in the air, what is the mass fraction of oxygen in the air?
- 4. Which is the density of oxygen and air
- 5. Under standard conditions, the density of oxygen is 1.429 g / L and that of air is 1.293 g / L Find (1) what is the mass fraction of oxygen in the air (2) mass ratio of oxygen to nitrogen in air (take integer ratio)
- 6. 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
- 7. 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
- 8. 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)?
- 9. 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?
- 10. 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
- 11. The volume ratio of oxygen and nitrogen in the air is 21:78.660 cubic meters. How many cubic meters of oxygen and nitrogen are there in the air?
- 12. The volume ratio of oxygen and other gases in the air is 21:79.1320 cubic meters. How many cubic meters of oxygen are there in the air?
- 13. How many cubic meters is one oxygen bottle
- 14. How many liters is a cubic meter
- 15. One ton of liquid oxygen and how many cubic meters of oxygen
- 16. The cube of x equals x, what is x equal to? Just the right answer
- 17. 1kg/m³=?g/cm³ 1g/cm³=?kg/m³
- 18. How to find the cube of 1kg / M =? G / cm
- 19. 720 cubic decimeter = () cubic meter
- 20. How to calculate CBM The box gauge is 54x42x23cm (weight of box after loading: 7.2kg) number of boxes: 137 The general algorithm is known, but not very clear. 3Q