The number of molecules and moles in 2.8375 litres of O2 at STP are respectively:
Some Basic Concepts (Mole Concept) · Class 11 · JEE Main Previous Year Question
The number of molecules and moles in litres of at STP are respectively:
- a
and
- b
and
- c
and
- d✓
and
and
🧠 Two questions, one mole count First find the moles. Then multiply by for molecules. Use the modern STP molar volume (post-1982 IUPAC standard at ).
🗺️ Two clean steps Moles . Molecules .
⚠️ STP version trap The number is exactly . That is your hint to use , not . Using here gives messy decimals that don't match any option.
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