A volume of 1 litre of N₂ and 7/8 L of O₂ at the same temperature and pressure were mixed together. — States of Matter and Gaseous State Chemistry Question
Question
A volume of 1 litre of N₂ and 7/8 L of O₂ at the same temperature and pressure were mixed together. What is the relation between the masses of the two gases in the mixture?

Answer: C
💡 Solution & Explanation
n_N₂/n_O₂ = 1/(7/8) = 8/7. Mass ratio: (m_N₂/28)/(m_O₂/32) = 8/7 → m_N₂/m_O₂ × (32/28) = 8/7 → m_N₂/m_O₂ = 1 → M_N₂ = M_O₂.
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