30cm3 pf hydrogen at s.t.p combine with 20cm3 of oxygen to form steam according to the following equation 2H2(g) + O2(g) → 2H2O(g). Calculate the total volume of the gaseous mixture at the end of the reaction
-
A.
50cm3 -
B.
35cm3 -
C.
30cm3 -
D.
25cm3