AIMAN MURTAZA on Nearpeer MDCAT Common Room
0.5 mole O₂ contains atoms: A 3×10²³ B 6×10²³ C 1.2×10²⁴ D 2×10²³ ( SINCE THE KEY AND ONLINE RESOURCES SEEM TO HAVE THIS WRONG -IF ANYONE KNOWS THE CORRECT WAY TO SOLVE THIS ,COULD YOU PLEASE SHARE THE SOLUTION WITH ME )
Dr.Samreen · 2026-08-18T10:54:43.247Z
But correct answer is 3×10^23
Umm e mavia · 2026-08-18T11:06:25.929Z
3.011×10^23 is the number of O2 molecules. Since each O2 molecule has 2 oxygen atoms, the number of atoms is 3.011×10^23×2=6.022×10^23. So if the question says ‘atoms,’ the answer should be B.
TAYYABA · 2026-08-18T11:06:09.963Z
1 mole=6x10^23 0.5mol=6x10^23/2 which is equal to 3x10^23
Umm e mavia · 2026-08-18T11:07:30.283Z
it is absolutely correct but for molecules question me atoms bola h
TAYYABA · 2026-08-18T11:08:07.287Z
or phr atom hn to 2 sa multiply ho jaega
Umm e mavia · 2026-08-18T11:12:55.018Z
Yes that's what I'm saying and multiply k Baad option B correct Hoga isn't it
Umm e mavia · 2026-08-18T10:47:18.230Z
0.5 mole O2 = 0.5×6.022×10^23 molecules. Since each O2 molecule has 2 atoms: 0.5×6.022×10^23×2=6.022×10^23 So correct answer B: 6×10^23 atoms
AIMAN MURTAZA · 2026-08-18T11:07:25.934Z
Thanks