Mr( FeSO4) = 1 * Ar ( Fe) + 1*Ar(S) + 4 * Ar (O) = 1 * 56 + 1 * 32 + 4 * 16 =152
<span>W ( S) = 32/152*100%=%</span>
Al(OH)3 + NaOH => NaAlO2 + 2H2O
HNO3 + KOH = KNO3 + H2O
H[+] + NO3[-] + K[+] + OH[-] = K[+] + NO3[-] + H2O
H[+]+ OH[-] = H2O
FeSO4 + 2KOH = Fe(OH)2↓ + K2SO4
Fe[2+] + SO4[2-] + 2K[+] + 2OH[-] = Fe(OH)2↓ + 2K[+] + SO4[2-]
Fe[2+] + 2OH[-] = Fe(OH)2↓
Na2CO3 + 2HNO3 = 2NaNO3 + CO2↑ + H2O
2Na[+] + CO3[2-] + 2H[+] + 2NO3[-] = 2Na[+] + 2NO3[-] + CO2↑ + H2O
2H[+] + CO3[2-] = CO2↑ + H2O
А)C7H16 + 11O2 -->7CO2+8H2O
бC7H15Cl+Cl2 -->C7H14CL2+HCL
в)C7H14Cl2+Cl2-->C7H12CL3+HCL
г)C2H4+H2-->C2H6
д)2C2H2+5O2-->4CO2+2H2O