Answers 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g) In the reaction above, the mass of carbon(IV)oxide… 2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g) In the reaction above, the mass of carbon(IV)oxide produced on burning… Read More
Answers The ion that can be used as an oxidizing agent is The ion that can be used as an oxidizing agent is A. Au3+ B. Fe3+ C. ClO– D.… Read More
Answers The idea of planetary electron was that of The idea of planetary electron was that of A. Rutherford B. Thompson C. Bohr D. Dalton Correct Answer:… Read More
Answers If 30cm3 of gas at 50oC is warmed to 80o at a fixed pressure, the… If 30cm3 of gas at 50oC is warmed to 80o at a fixed pressure, the fractional increase in… Read More
Answers A decrease in atomic size and an increase in nuclear charge across a period lead… A decrease in atomic size and an increase in nuclear charge across a period lead to A. an… Read More
Answers The order in which a mixture of sand, ammonium chloride and sodium chloride can be… The order in which a mixture of sand, ammonium chloride and sodium chloride can be separated is A.… Read More
Answers What is the molar mass of a substance, if 0.4 mole of the substance has… What is the molar mass of a substance, if 0.4 mole of the substance has a mass of… Read More
Answers The element with the electron configuration 1s22s22p3 is The element with the electron configuration 1s22s22p3 is A. calcium B. chlorine C. oxygen D. nitrogen Correct Answer:… Read More
Answers A difference between chemical and physical change is that in a chemical change A difference between chemical and physical change is that in a chemical change A. oxygen is consumed B.… Read More
Answers The volume of 2.5 moles of oxygen at s.t.p is [Molar volume of a gas… The volume of 2.5 moles of oxygen at s.t.p is [Molar volume of a gas at s.t.p =… Read More