it would be fine if you used arrows.. --> makes life more simple
i cant read the first equation
for the second
use the formula
p*V = n*R*T V in m3, T in Kelvin, ...
n=p*V/(R*T) then you get the moles of Cl2
if you look at your equation you see how many moles of MnO2 you need for one mole of Cl2....
the rest is up to you,
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