The volume occupied by 1.6 g of O2 at S.T.P is:
Correct answer: A. 2.24dm3
- A. 2.24dm3
- B. 1.12dm3
- C. 22.4dm3
- D. 24dm3
Explanation
To find the volume of 1.6 g of O2 at STP (Standard Temperature and Pressure), we can use the ideal gas law equation: PV = nRT. At STP, the pressure is 1 atm and the temperature is 273 K. Given that the molar mass of O2 is 32 g/mol, we can calculate the number of moles of O2 using the mass provided. By rearranging the equation, we can then solve for the volume.
This question appeared on the KMU Centralized Admission Test 2021 paper, which you can sit online with every answer explained.
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About Standard Temperature and Pressure
Standard temperature and pressure provide reference conditions for gas calculations: 0°C or 273 K and, in the usual school convention, 1 atm pressure. Questions use these conditions to relate pressure, volume, temperature and amount of gas, including the molar volume of an ideal gas, about 22.4 dm³.
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