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2486
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm3 of solution. Calculate the concentration of the solution. [Na2CO3 = 106.0]
  • A. 0.4 mol dm-3
  • B. 1.0 mol dm-3
  • C. 10.6 mol dm-3
  • D. 25.0 mol dm-3
View Answer & Discuss (7) WAEC 2010
2487

What is the volume occupied by 2 moles of ammonia at s.t.p?

  • A. 44.8 dm-3
  • B. 22.4 dm-3
  • C. 11.2 dm-3
  • D. 5.6 dm-3
View Answer & Discuss (3) WAEC 2010
2488

Which of the following apparatus can be used to measure accurately a specific volume of a liquid?

  • A. Beaker
  • B. Conical flask
  • C. Measuring cylinder
  • D. Pipette
View Answer & Discuss (5) WAEC 2010
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2489
A given volume of oxygen diffused through a porous partition in 8 seconds. How long would it take the same volume of carbon (IV) oxide to diffuse under the same condition? [C = 12.0, O = 16.0]
  • A. 5.8 seconds
  • B. 6.8 seconds
  • C. 9.4 seconds
  • D. 11.0 seconds
View Answer & Discuss (7) WAEC 2010
2490

Which of the following gases contains the highest number of atoms at s.t.p?

  • A. 6 moles of neon
  • B. 3 moles of oxygen
  • C. 2 moles of chlorine
  • D. 1 mole of ethane
View Answer & Discuss (15) WAEC 2010
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