Multiple choice

Under the same conditions of temperature and pressure, 1 l of oxygen gas was mixed 1 l of carbon dioxide gas. The mass ration of the gases in the mixture will be:

  1. 1:1

  2. 8:11

  3. 11:8

  4. 16:44
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B Correct answer
Explanation

Under the same conditions, 1L of each gas contains the same number of moles (Avogadro's Law). Molar mass of O2 = 32 g/mol, CO2 = 44 g/mol. The ratio of masses is 32:44, which simplifies to 8:11.

AI explanation

Under the same conditions of temperature and pressure, equal volumes of gases contain equal numbers of moles, meaning the mole ratio is 1:1. The molar mass of oxygen is 32 g/mol and the molar mass of carbon dioxide is 44 g/mol. Multiplying the equal mole ratio by these molar masses gives a mass ratio of 32:44, which simplifies to 8:11.

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