0620/12 Chemistry Feb Mar 2016 Online Test | Cambridge IGCSE MCQ
CIE
IGCSE
Chemistry (0620)
خرداد
2016
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه

پیش نمایش صفحه اول فایل
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?