Question

Номер 23 пожалуйста мне сейчас нужно (28 октября)длина класса 10 м , ширина 7м высота 4 мсколько кг кислорода содержится в массе воздуха наполняющей объем класса если масса 1м(в кубе)воздуха равна 1.3кг, а кислород составяет 22 %этой массы? ответ округлите до едениц!

Answer 1

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Answer 2

Calculation of Oxygen Mass in the Given Volume

To calculate the mass of oxygen in the given volume of the classroom, we need to determine the volume of the classroom and the percentage of oxygen in the air.

Given: - Length of the classroom: 10 m - Width of the classroom: 7 m - Height of the classroom: 4 m

To find the volume of the classroom, we multiply the length, width, and height: Volume = Length x Width x Height = 10 m x 7 m x 4 m = 280 m³

Next, we need to determine the mass of 1 m³ of air. According to the given information, the mass of 1 m³ of air is 1.3 kg.

Now, we need to find the percentage of oxygen in the air. According to the given information, oxygen constitutes 22% of the mass of air.

To calculate the mass of oxygen in the given volume, we multiply the volume of the classroom by the mass of 1 m³ of air and the percentage of oxygen: Mass of Oxygen = Volume x Mass of 1 m³ of Air x Percentage of Oxygen Mass of Oxygen = 280 m³ x 1.3 kg/m³ x 0.22

To find the answer, we can calculate the result: Mass of Oxygen = 280 m³ x 1.3 kg/m³ x 0.22 = 100.32 kg

Therefore, the mass of oxygen contained in the air filling the given volume of the classroom is approximately 100.32 kg.