3Cu+8HNO3=3Cu(NO3)2+2NO+4H2On(Cu)=120:64=1,875моль;n(HNO3)=(1,875*8):3=5моль;m(HNO30)=5*63=315гр.<span>m(раствора)=315:0,2=1575гр.</span>
CH2 = C - CH = CH2 + 2H2 -------> CH3 - CH - CH2 - CH3
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CH3 CH3
Br Br
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CH2 = C - CH = CH2 + 2Br2-------> CH2Br - C - CH - CH2Br
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CH3 CH3
CH2 = C - CH = CH2 + 2HBr -------> CH3 - CHBr - CHBr - CH3
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CH3 CH3
M = 115 (г)
M(Na)= 23 (г/моль)
n = m/M = 115/23 = 5 (моль)