The volume at S.T.P. occupied by 8 g of N2 is:
Correct answer: B. 6.44 dm3
- A. 2.24 dm3
- B. 6.44 dm3
- C. 1.12 dm3
- D. 112 dm3
Explanation
First, we find out the number of moles using the formula moles = mass/MrMr of nitrogen will be 14+14 = 28So 8/28 = 0.28Then we use volume = moles x 24 (for dm3)Hence we get 6.85 which is approximately closer to 6.44 dm3.
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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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