The number of moles of oxygen in one litre of air (21% oxygen by volume) at S.T.P. would be

  1. Home
  2. Back

Question:
The number of moles of oxygen in one litre of air (21% oxygen by volume) at S.T.P. would be

1.0.186 mol

2.0.21 mol

3.2.10 mol

4.0.0093 mol.

Posted Date:-2021-09-30 17:03:25

More MCQS Questions and answers

  1. 0.6 mol of barium chloride in solution is mixed with 0.2 mol of sodium phosphate the amount of barium phosphate produced is
  2. 12 g of Mg (at. Mass 24) react with dilute mineral acid to produce maximum hydrogen equal to
  3. 142 g of chlorine represents
  4. 27 g of Al will completely react with.
  5. 27 g of aluminium will react completely with
  6. 276 g of silver carbonate on being strongly heated yields a residue weighing.
  7. 30 mL of an acid is neutralized by 15 mL of 0.2 N alkali. The strength of the acid is
  8. 33.6 L of water vapour at S.T.P. are condensed to liquid state. The volume occupied by it is approximately.
  9. 4 g of hydrogen is ignited with 4 g of oxygen the amount of water Formed is
  10. 50 ml of samples of distilled water ordinary tap water and boiled tap water requires 2 ml 26 and 10 of soap solution respectively to form permanent lather. The ratio of permanent hardness to temporary hardness in tap water is
  11. A certain gaseous mixture contains methane and sulphur dioxide in ratio of 1: 8 by mass. The ration of the number of molecules is
  12. A mixture of sand and naphthalene can be separted by.
  13. Among the pairs of compounds given below which pair contains compounds with different percentage of carbon?.
  14. During synthesis of ammonia from its constituent elements the volume of the product relative to the total volume of thereacting species is.
  15. If atomic mass of oxygen were taken as 100 the molecular mass of water would be Approximately
  16. If given sample of potassium chlorate is 80% pure then 48 g of oxygen would be produced from
  17. If specific heat of certain element is 0.064. Its approximate atomic mass is200
  18. On dividing 0.86 by 16.564 the actual answer is 0.0519198. The correctly reported answer will be
  19. On rendering anhydrous the sample of hexahydrate calcium (II) chloride loses
  20. Sodium carbonate crystals lose water molecules on exposure to atmosphere. The related property is called.
  21. The balancing of chemical equation is based upon.
  22. The compound AB contains elements A and B in the ratio of 1:35.5 by mass. The mass of B that will be required to react with 2 g of A is
  23. The compounds with identical crystal structures and analogouschemical formulae are calledallotropes.
  24. The conversion of oxygen to ozone occurs to the extent of 15% only. The mass of ozone that can be prepared from 67.2 L of oxygen at N.T.P. will be
  25. The correctly reported difference of 18.3426 and 8.06 willhave significant figures equal to
  26. The density of chlorine relative to air is.
  27. The mass of 60% HCl required for the neutralization of 10 L of 0.1 M KOH is
  28. The mass of 60% HCl required for the neutralization of 10 L of 0.1 M KOH is
  29. The molality of a solution containing 5 g of sodium hydroxide in 250 g of solution
  30. The molarity of the solution containing 2.8% mass-volume solution of KOH is
  31. The mole fraction of solute in 1 molal aqueous solution is
  32. The mole fraction of solute in 1 molal aqueous solution is
  33. The mole fraction of water in a solution containing 117 g sodium chloride and 900 g of water is
  34. The number of atoms is largest in
  35. The number of moles of lead nitrate which are required to be decomposed to produce 48 of Oxygen
  36. The number of moles of NaCl in 3 L of 3 M NaCl solution is
  37. The number of moles of oxygen in one litre of air (21% oxygen by volume) at S.T.P. would be
  38. The number of moles of sodium oxide present in 620 g of it are
  39. The percentage of hydrogen in water and hydrogen peroxide is11.1 and 5.9% respectively. These figures illustrate
  40. The volume of oxygen required for complete combustion of 20 ml of ethane is
  41. Vapour density of a metal chloride is 77. The equivalent mass is 3. Its atomic mass would be
  42. When 4.0 g of iron is burnt at high temperature to ferric oxide at constant pressure 29.28 kJ Of heat is evolved. The amount of heat evolved for producing one mole of ferric oxide is
  43. Which of following acid can show optical isomerism?
  44. Which of the following best explains the law of conservation of mass?
  45. Which of the following does not have same number of atoms?
  46. Which of the following does not have same percentage ofcarbon as in ethane?
  47. Which of the following illustrates the law of conservation of mass?
  48. Which one of the following solution of sulphuric acid will exactly neutralize 25 ml of 0.2 M NaOH solution?
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!