Question

molar volume at stp is 1 mol/l
standard temperature is 20 °c.
molar volume @ stp is 22.4 l/mol.
molar volume at stp is 1 l/mol.
standard pressure is 760 mmhg.
standard pressure is 0 atm.
standard pressure is 1 atm.
standard temperature is 0 °c.
standard temperature is 273 k.

Explanation:

To determine the correct statements, we recall the definitions of STP (Standard Temperature and Pressure) and molar volume at STP:

• Molar Volume at STP: The volume occupied by 1 mole of an ideal gas at STP is \( 22.4 \, \text{L/mol} \).
• Standard Temperature: \( 0^\circ \text{C} \) (or \( 273 \, \text{K} \)).
• Standard Pressure: \( 1 \, \text{atm} \) (or \( 760 \, \text{mmHg} \), since \( 1 \, \text{atm} = 760 \, \text{mmHg} \)).

Now, we analyze each option:

• "Molar volume at STP is 1 mol/L": Incorrect (units and value are wrong).
• "Standard temperature is \( 20^\circ \text{C} \)": Incorrect (STP temperature is \( 0^\circ \text{C} \)).
• "Molar Volume @ STP is \( 22.4 \, \text{L/mol} \)": Correct (matches the definition).
• "Molar volume at STP is \( 1 \, \text{L/mol} \)": Incorrect (value is wrong).
• "Standard pressure is \( 760 \, \text{mmHg} \)": Correct (\( 1 \, \text{atm} = 760 \, \text{mmHg} \)).
• "Standard pressure is \( 0 \, \text{atm} \)": Incorrect (STP pressure is \( 1 \, \text{atm} \)).
• "Standard pressure is \( 1 \, \text{atm} \)": Correct (matches the definition).
• "Standard Temperature is \( 0^\circ \text{C} \)": Correct (matches the definition).
• "Standard temperature is \( 273 \, \text{K} \)": Correct (\( 0^\circ \text{C} = 273 \, \text{K} \)).

Answer:

• Molar Volume @ STP is \( 22.4 \, \text{L/mol} \)
• Standard pressure is \( 760 \, \text{mmHg} \)
• Standard pressure is \( 1 \, \text{atm} \)
• Standard Temperature is \( 0^\circ \text{C} \)
• Standard temperature is \( 273 \, \text{K} \)