yeah, a lot faster than sound.
answer: the balanced hemical equation is given below. 18 moles of oxygen are produced.
when 2 moles of potassium chlorate decomposes to produce 2 moles of potassium chloride and 3 moles of oxygen gas. the balanced chemical equation for this decomposition reaction follows:
by stoichiometry of the reaction,
2 moles of potassium chlorate produces 3 moles of oxygen gas
so, 12 moles of potassium chlorate will produce = of oxygen gas.
hence, 18 moles of oxygen gas will be produced.
this is known that the number of moles of solute will remain the same even on dilution.
the relation between mole and molarity is
so the moles before and after dilution will be equated as:
m1=initial molarity = 15.9 m
v1= initial volume = ?
m2= final molarity = 5 m
v2 = final volume = 1.80 l
thus we will take 0.566 l of concentrated nitric acid and will dilute it to 1.8 l.
the balanced equation for the combustion reaction is
ch₄ + 2o₂ > co₂ + 2h₂o
molar ratio of methane - ch₄ to o₂ is 1: 2
mass of methane burned - 32.0 g
number of methane moles burned - 32.0 g / 16 g/mol = 2 mol
according to molar ratio 1 mol of methane reacts with 2 mol of oxygen
therefore 2 mol of methane reacts with 4 mol of oxygen
answer is b. 4 mol