The number of molecules of oxygen in the room.
The number of molecules of oxygen in the room is .
Given that, the length of a sealed room in a hospital is , the width of a sealed room in a hospital is and the depth of a sealed room in a hospital is .
It is known that, one cubic meter contains 1000 L and 22.4 L of any gas contains .
Substitute for Length, for Width and for Depth in the formula to calculate volume of a sealed room.
Use the unit conversion of into L to convert volume of a sealed room in into L.
Calculate the number of molecules in 22.4 L as follows.
Therefore, the number of molecules in 1 L is .
Substitute for volume of a sealed room and for number of molecules in 1 L.
Now, move decimal 4 places to the left and add 4 to the power of 10 to write the above quantity in proper scientific notation as follows.
Round off the above quantity to two decimal places.
Therefore, the number of molecules of oxygen in the room is .
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