In the reaction 2k + 2h2o→2koh + h2 , which compound has an element ratio of 2: 1 ?

koh

h2

h2o

k

Option O = H₂O

Explanation:

Chemical reaction:

2K + 2H₂O   →     2KOH + H₂

In this balanced chemical equation we can see that water is the only compound that consist of two hydrogen atom and one oxygen atom. H : O

2 : 1 .

In case of KOH two hydroxyl and two potassium atom are present and ration is K:OH  1:1.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer