Дано
m(ppa H2SO4) = 196 g
W(H2SO4) = 10%
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m(Al(OH)3)-?
m(H2SO4) = 196*10% / 100% = 19,6 g
2AL(OH)3+3H2SO4-->Al2(SO4)3+6H2O
M(H2SO4) = 98n g/mol
n(H2SO4) = m/M =19.6 /98 = 0.2 mol
n(Al(OH)3) = 3n(H2SO4)
n(H2SO4) = 0.2 / 3 = 0.066 mol
M(Al(OH)3) = 78 g/mol
m(Al(OH)3) = n*M = 0.066 * 78 = 5.15 г
ответ 5.15 g
CaCO3 + CO2 -> CaCO3
n(CaO) = n(CO2)
n(CaO) = 2,8/56 = 0,05 моль => n(CO2) = 0,05 моль
V(CO2) = 0,05 * 22,4 = 1,12 л
1. <span>А)Br
2. </span>Б)1s22s22p63s23p6
3. <span> Б) Э2О5 и ЭН3 (N</span>₂O₅ и NH₃)
4. Б)Te-Se-S-O
5. <span>Б) 2</span> (N₂+3H₂=2NH₃)
Ba+2H20= Ba(OH)2+H2
Ba(OH)2+N2O5=Ba(NO3)2+H2O
Ba(NO3)2+MgSO4=BaSO4+Mg(NO3)2
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BaCO3=BaO+CO2
CO2+CaO=CaCO3
CaCO3+H2O=H2CO3
H2CO3+NaOH=NaHCO3+H2O
H2O+Na2O=2NaOH
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Где прочерки там не знаю