1)
Molar mass of CH4,
MM = 1*MM(C) + 4*MM(H)
= 1*12.01 + 4*1.008
= 16.042 g/mol
mass of CH4 = 27.1 g
mol of CH4 = (mass)/(molar mass)
= 27.1/16.04
= 1.689 mol
Balanced chemical equation is:
CCl4 + CH4 ---> 2CH2Cl2
According to balanced equation
mol of CH2Cl2 formed = (2/1)* moles of CH4
= (2/1)*1.689
= 3.379 mol
Molar mass of CH2Cl2,
MM = 1*MM(C) + 2*MM(H) + 2*MM(Cl)
= 1*12.01 + 2*1.008 + 2*35.45
= 84.926 g/mol
mass of CH2Cl2 = number of mol * molar mass
= 3.379*84.93
= 287 g
Answer: 287 g
2)
Molar mass of Fe = 55.85 g/mol
mass of Fe = 26.5 g
mol of Fe = (mass)/(molar mass)
= 26.5/55.85
= 0.4745 mol
Balanced chemical equation is:
4Fe + 3 O2 —> 2 Fe2O3
According to balanced equation
mol of O2 reacted = (3/4)* moles of Fe
= (3/4)*0.4745
= 0.3559 mol
Molar mass of O2 = 32 g/mol
mass of O2 = number of mol * molar mass
= 0.3559*32
= 11.39 g
Answer: 11.4 g
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