The length of the room is 6.5 m, the width is 4.8 m, and the height is 3 m. How many kilograms of oxygen is contained in the mass
| February 17, 2021 | education
The length of the room is 6.5 m, the width is 4.8 m, and the height is 3 m. How many kilograms of oxygen is contained in the mass of air filling the volume of this room, if the mass of 1 m3 in a cube of air is 1.29 kg, and oxygen is 0.21 of this mass?
1. The room is a three-dimensional rectangular parallelepiped, the volume of which is 6.5 * 4.8 * 3 = 93.6 m3.
2. Thus, there is 93.6 m3 of air in this room.
3. According to the condition of the problem, the mass of 1 m3 of air is 1.29 kg, which means that 93.6 m3 of air weighs 93.6 * 1.29 = 120.744 kg.
4. Since oxygen is 0.21 of the mass of all air, it means that there is 120.744 * 0.21 = 25.35624 kg in the room. oxygen.
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