1)масса кислорода равна 44,8/22,4=х/32 х=64
2)5*22,4=112л
3)5,6/22,4=х/6,02*10^23
X=1.505*10^23
MHBr1=65*0.8=52g
mHBr2=50*0.4=20g
m(r-ra)3=65+50=115g
mHBr3=50+20=72g
wHBr=72/115*100=65.2\%
СаО+СО2=СаСО3
Fe+H2SO4=FeSO4+H2
CO2+2NaOH=Na2CO3+H2O
H2+Cl2=2HCl
H2O+SO3=H2SO4
CuO+H2=Cu+H2O
TiCl4+2Mg=2MgCl2+Ti
MgO+H2SO4=MgSO4+H2O
1. 1) СН3-СН(СН3)-СН2-СН2-I + KOH -EtOH-> CH3-CH(CH3)-CH=CH2 + KI + H2O
2)
CH3-CH(CH3)-CH=CH2 + HI -> CH3-CH(CH3)-CH(I)-CH3
3) CH3-CH(CH3)-CH(I)-CH2 + KOH -EtOH-> CH3-C(CH3)=CH-CH2 + KI + H2O
4) 3CH3-C(CH3)=CH-CH3 + 2KMnO4 + 4H2O = 3CH3-C(CH3)(OH)-CH2-CH3 + 2MnO2 + 2KOH
2. CH3-CH2-CH2OH + HI -> CH3CH2CH2I + H2O
CH3CH2CH2I + KOH -тут водный наверное, вы в условии ошиблись-> CH3-CH2-CH2ОН + KI
CH3-CH2-CH2ОН -H2SO4> CH3-CH=CH2 + H2O
CH3-CH=CH2 + H2O -> CH3-CH(OH)-CH3
CH3CH(OH)CH3 + CuO -> CH3-C(=O)-CH3 (ацетон) + Cu + H2O
CH3C(=O)CH3 + H2 -Ni-> CH3-CH(OH)-CH3