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1mol苯酚的同系物,在氧气中充分燃烧后,生成co2和水,消耗的氧气的物质的量是( )A(3n-4)/2B(3n-4)/20C(3n-3)/2D(3n-3)/20
题目内容:
1mol苯酚的同系物,在氧气中充分燃烧后,生成co2和水,消耗的氧气的物质的量是( )
A(3n-4)/2
B(3n-4)/20
C(3n-3)/2
D(3n-3)/20优质解答
苯酚同系物燃烧的化学方程式:CnH(2n-6)O+(n+(2n-6)/4-1/2)O2→nCO2+((2n-6)/2)H2O 所以将O2前的化学计量数化简可得 n+(n-3)/2-1/2=n+n/2-3/2-1/2=3n/2-2=(3n-4)/2 所以选A.
1mol苯酚的同系物,在氧气中充分燃烧后,生成co2和水,消耗的氧气的物质的量是( )
A(3n-4)/2
B(3n-4)/20
C(3n-3)/2
D(3n-3)/20
A(3n-4)/2
B(3n-4)/20
C(3n-3)/2
D(3n-3)/20
优质解答
苯酚同系物燃烧的化学方程式:CnH(2n-6)O+(n+(2n-6)/4-1/2)O2→nCO2+((2n-6)/2)H2O 所以将O2前的化学计量数化简可得 n+(n-3)/2-1/2=n+n/2-3/2-1/2=3n/2-2=(3n-4)/2 所以选A.
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