2 in front of H2. Technically nothing in front of O2 otherwise put a 1 then a 2 in front of H2O
2H20 + 1O2 —— > 2H2O
Answer:
what is that what grade is that is so confusing

Ethene react with oxygen at a
molar ratio:

Convert the quantity of each reactant supplied to number of moles of particles:
The question stated not whether both reactants were used up in this process. Thus start by testing the assumption that e.g., ethene was used up while some oxygen gas were left unreacted (ethene as the <em>limiting </em>reagent.) Under this assumption, the relative availability of the two species,
and
(as seen in the balanced chemical equation) shall satisfy the relationship

In other words,


Evaluating the expression
with data given in the question yields approximately
, which does satisfy the relationship. Hence the assumption holds and ethene is the limiting reactant.
The quantity of a reactant produced in a chemical reaction is related to its stoichiometric (of relating to proportions) relationship with the limiting reactant (or any of the reactants in case of more than one limiting reactant.) For this scenario, given the molar ratio
,


Im pretty sure that the current will increase so the answer is A . Hope that helps
At -55°,volume=590ml
At 30°,volume=?
;-55°=590ml
30°=V
V=30/-55×590ml
V=-321.82ml
but we don't have a negative volume so V=321.82ml