1,800 kg
900 kg
600 kg
2,400 kg
1,200 kg
Correct answer is D
2C2H6+7O2→4CO2+6H2O
addition of oxygen causes weight gain, expelled CO2 results in weight loss
for oxygen added;
2moles C2H6 = 7moles O2
2(30)g C2H6 = 7(2)(16)g O2
3000kg C2H6 = X kg O2
cross multiplying X = 11200kg
for CO2 expelled;
2moles C2H6 = 4moles CO2
2(30)g C2H6 = 4(44)g CO2
3000kg C2H6 = Y kg CO2
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.