Oblicz zawartość procentową (% masowy) węgla w butanie.
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M C4H10 = 12 * 4 + 1 * 10 = 48 + 10 = 58 u
% C = 48 / 58 * 100 % = 82,75 %
odp; zawartosc % wegla w butanie wynosi 82,75 %
mC=4*12u=48u
mC₄H₁₀=48u+10*1u=58u
100% - 58u
x - 48u
x=(48u*100%)/58u
x=82,8%