Paper 1 February/March 2017 CHEMISTRY (9701/12) IGCSE
Cambridge
AS & A Level
Chemistry (9701)
خرداد
2017
شامل مباحث:
تعداد سوالات: 30
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه

پیش نمایش صفحه اول فایل
Ammonium sulfate, ${\left( {N{H_4}} \right)_2}S{O_4}$, and ammonium nitrate, $N{H_4}N{O_3}$, are used as fertilisers.
These salts have different percentages by mass of nitrogen. They have the same effect as each other on the pH of wet neutral soil.
Which row is correct?