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.
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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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