Question

2. Elements X and Y combine to form the gas XY2.
What are X and Y?
А. Xcalcium Ychlorine
B. Xcarbon Yhydrogen
C. Xcarbon Yoxygen
D. Xhydrogen Yoxygen
explain why

Answer 1

Answer:

c) X - Carbon and Y - Oxygen

Explanation:

A) Ca + Cl -------> CaCl2 which is not a gas .

B) C + H2 ---------> CH2 which is not a gas

C) C + O2 ----------> CO2 which is a gas

D) 2H2 + O2 --------->2H2O which is not a gas .