Question

Which of the following equations is balanced?
H2+ O2arrowH2O

H2 + O2arrowH2O + O2

2H2 + O2arrow2H2O

4H2 + O2arrowH2O + O

Answer 1

@Michele_Laino

Answer 2

it is the third one:
\[{\text{2}}{{\text{H}}_{\text{2}}}{\text{ + }}{{\text{O}}_{\text{2}}} \to {\text{2}}{{\text{H}}_{\text{2}}}{\text{O}}\]
since we have four atoms of hydrogen at both sides, and we have 2 atoms of oxygen at both sides

Answer 3

Oh.. i was looking at C but i kept thinking it was B. I have one more question though if thats okay

Answer 4

Which statement accurately describes the illustration?
Hydrogen has a valence of 1 and oxygen has a valence of 6.

Hydrogen has a valence of 1 and oxygen has a valence of 8.

Hydrogen has a valence of 1 and oxygen has a valence of 2.

Hydrogen has a valence of 2 and oxygen has a valence of 6.

Answer 5

It is the first option, since hydrogen has only one valence electron, whereas oxygen has 6 valence electrons