1,800 kg
900 kg
600 kg
2,400 kg
1,200 kg
Correct answer is D
2\(C_2H_6 + 7O_2 →4CO_2 + 6H_2O\)
addition of oxygen causes weight gain, expelled \(CO_2\) results in weight loss
for oxygen added;
2moles \(C_2H_6\) = 7moles \(O_2\)
2(30)g \(C_2H_6\) = 7(2)(16)g \(O_2\)
3000kg \(C_2H_6\) = X kg \(O_2\)
cross multiplying X = 11200kg
for \(CO_2\) expelled;
2moles \(C_2H_6\) = 4moles \(CO_2\)
2(30)g \(C_2H_6\) = 4(44)g \(CO_2\)
3000kg \(C_2H_6\) = Y kg \(CO_2\)
cross multiplying Y = 8800kg
since X > Y, the plane has a net weight gain.
Net weight gain = X - Y = 11200-8800 = 2400kg.
Which of the following is a neutralization reaction?
Addition of sodium chloride solution to potassium chloride solution
Addition of trioxonitrate (V) acid (nitric acid) to distilled water
Addition of trioxonitrate (V) acid (nitric acid) to tetraoxosulphate (IV) acid (sulphuric acid)
Addition of trioxonitrate (V) acid (nitric acid) to potassium trioxonitrate (V) (potassium nitrate) solution
Addition of trioxonitrate (V) acid (nitric acid) to potassium hydroxide solution
Correct answer is E
No explanation has been provided for this answer.
The mass of an atom is determined by
its ionization potential
its electrochemical potential
the number of protons and electrons
the number of neutrons and protons
the number of neutrons and electrons
Correct answer is D
No explanation has been provided for this answer.
Na2SO4
CuSO4
CaSO4
CaCI2
(NH4)2SO4
Correct answer is B
No explanation has been provided for this answer.
O2
NO
SO2
NH3
CO2
Correct answer is C
No explanation has been provided for this answer.