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876

The number of hydrogen ions in 4.9 g of tetraoxosulphate (IV) acid is?

(S = 32, O =16, H = 1, Avogadro Number = 6.02 x 10\(^{23}\) )

  • A. 3.01 x 1022
  • B. 6.02 x 1022
  • C. 3.01 x 1023
  • D. 6.01 x 1023
View Answer & Discuss (19) JAMB 1995
877

What volume of oxygen will remain after reacting 8cm\(^3\) of hydrogen with 20cm\(^3\) of oxygen?

  • A. 10 cm3
  • B. 12 cm3
  • C. 14 cm3
  • D. 16 cm3
View Answer & Discuss (32) JAMB 1995
878
A gas sample with an initial volume of 3.25 dm3 is heated and allowed to expand to 9.75 dm3 at constant pressure. What is the ratio of the final absolute temperature to the initial absolute temperature?
  • A. 3:1
  • B. 5:2
  • C. 5:4
  • D. 8:3
View Answer & Discuss (8) JAMB 1995
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879

Two cylinders A and B each contains 30 cm\(^3\) of oxygen and nitrogen respectively at the same temperature and pressure. If there are 5.0 moles of nitrogen, then the mass of oxygen is?

  • A. 3.2 g
  • B. 6.4 g
  • C. 80.0 g
  • D. 160.0 g
View Answer & Discuss (20) JAMB 1995
880

A liquid begins to boil when?

  • A. its vapour pressure is equal to the vapour pressure of its solid at the given temperature
  • B. molecules start escaping from its surface
  • C. its vapour pressure equals the atmosphere pressure
  • D. its volume is sightly increased
View Answer & Discuss (2) JAMB 1995
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