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Kc calculations

im really stuck

1 mol of nitrogen reacts with 1 mole of oxygen gas according to

n2 +o2+2no

calculate
the no. moles of nitrogen gas and oxygen gas remaining in the equalibrium mixture and the mass of nitrogen monoxide formed

how would i do this
Write initial moles of reactants and products
write change in amount of reactants and products
calculate final moles at equilibrium in terms of change
write expression for Kc
replace concentrations
solve for the unknown value which is change in amount of reactant and products
find final moles of substances
find mass of NO by multiplying by Mr

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