ДАНО
v(c6h6) = 4 l
p(C6H6) = 0.54 g/cm
V(возд) - ?
m(C6H6) = p(C6H6) * V(C6H6) = 0.54*4 = 2.16 g
2С6Н6 + 15 О2 = 12СО2 + 6Н2О
M(C6H6) = 78 g/mol
n(C6H6) = m/M = 2.16 / 78 = 0.028 mol
2n(C6H6) = 15 n(O2)
n(O2) = 15*0.028 / 2 = 0.21 mol
V(O2) = n*Vm = 0.21*22.4 = 4,704 L
V(возд) = 4.704*100% / 21% = 22.4 L
ответ 22.4 л
Объяснение:
ДАНО
v(c6h6) = 4 l
p(C6H6) = 0.54 g/cm
V(возд) - ?
m(C6H6) = p(C6H6) * V(C6H6) = 0.54*4 = 2.16 g
2С6Н6 + 15 О2 = 12СО2 + 6Н2О
M(C6H6) = 78 g/mol
n(C6H6) = m/M = 2.16 / 78 = 0.028 mol
2n(C6H6) = 15 n(O2)
n(O2) = 15*0.028 / 2 = 0.21 mol
V(O2) = n*Vm = 0.21*22.4 = 4,704 L
V(возд) = 4.704*100% / 21% = 22.4 L
ответ 22.4 л
Объяснение: