A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure

Mole Concept (10)

A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure:

  1. Find the number of moles of hydrogen present.
  2. What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
  3. If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
  4. State the law that helped you to arrive at the above result

Answer

  1. Number of moles of hydrogen = 1000/2 = 500
  2. Mass of CO2 = 500 × (12 + 32) = 500 × 44 = 22000 g = 22 kg
  3. Number of molecules of CO2 = X
  4. According to Avogadro’s law, equal volumes of all gases contain the same number of molecules under the same conditions of temperature and pressure.
  • Exam Year: 2017