Answer:
devices that move a robot's joints
Explanation:
2H2O + 1O2 → 2H2O2
by semiractions:
(1) 2 H2O → H2O2 + 2H+
(2) 2H+ + O2 → H2O2
(1) + (2):
⇒ 2H2O + O2 → 2H2O2
4 - O - 4
4 - H - 4
I am not sure about my answer, but I think that it's density allows it to fall to the ground/floor.
true.
Hope this helps!