Out of the available answers, the most likely correct would be that
eventually everyone must sleep due to our need for mental rest. However,
it is not as simple as this, as all of the processes implicated with
mental rest (including the restoration of biological rhythms as
mentioned in an alternative answer) cannot necessarily be summed up in
this way.
11.2L / 22.4L/mol = . 5 mol H2 40g / 160g/mol = . 25 mol Br2.
Answer:
The limiting reactant is propene,
.
Explanation:

Moles of nitrogen propene = 2 mol
Moles of oxygen = 10 mol
According to reaction, 2 moles of propene reacts with 9 moles of oxygen gas, then 2 moles of propene will react with:

According to the question, we have 10 moles of oxygen gas, which is more than 9 moles of oxygen gas. This indicates that propene is present in a limiting amount hence, it is a limiting reactant.
The limiting reactant is propene, hence the correct answer is the
.