An experiment to find the percentage of oxygen in $150c{m^3}$ of polluted air is shown.
The apparatus is left for one week.
After this time, the volume of gas in the measuring cylinder is $122c{m^3}$.
What is the percentage of oxygen, to the nearest whole number, in the polluted air?
19%
2 )
21%
3 )
28%
4 )
81%
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!
پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...