Paper 1 May/June 2017 CHEMISTRY (9701/12) IGCSE
Cambridge
AS & A Level
Chemistry (9701)
شهریور
2017
شامل مباحث:
تعداد سوالات: 45
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Phosphorus reacts with concentrated sulfuric acid to produce phosphoric acid, sulfur dioxide and water.
aH$_2$SO$_4$ + bP $\to$ cH$_3$PO$_4$ + dSO$_2$ + eH$_2$O
a, b, c, d and e are all whole numbers.
The equation can be balanced by using oxidation numbers.
What is the value of the sum a + b + c + d + e?