. Pembakaran sempurna gas etana (C2H6) menurut reaksi : 2C2H6(g) + 7O2 (g) 4CO2 (g) + 6H2O(g) jika gas etana digunakan 15 g.(arC :12, H: 1, O: 16) tentukan: a. jmlh molekul O2yg diperlukan(L=6x10^3) b. massa gas CO2 c. Vol uap air yg dihasilkan, (P) ,(T) =0 ,N2=5 liter
Mirina
Mol etana = 15 g : 30= 0,5 mol mol CO2 = 4/2x0,5 = 1 mol mol O2 = 7/2x0,5 = 1,75 mol mol H₂O=6/2x0,5 = 1,5 mol volume a.jumlah molekul O2 = mol x L = 1,75 x 6.10²³ = 10,5.10²³ molekul = 1,05.10²⁴ b.massaCO2= mol x Mr = 1 x 44 = 44 gram c.volume uap air= mol x 22,4= 1,5x22,4 = 33,6 liter
mol CO2 = 4/2x0,5 = 1 mol
mol O2 = 7/2x0,5 = 1,75 mol
mol H₂O=6/2x0,5 = 1,5 mol
volume
a.jumlah molekul O2 = mol x L = 1,75 x 6.10²³ = 10,5.10²³ molekul = 1,05.10²⁴
b.massaCO2= mol x Mr = 1 x 44 = 44 gram
c.volume uap air= mol x 22,4= 1,5x22,4 = 33,6 liter