C-06-Q122mediumsingle_mcq১ মোল CO2\mathrm{CO_2}CO2 এ অক্সিজেন পরমাণু সংখ্যা—a6.023×10236.023 \times 10^{23}6.023×1023b2×6.023×10232 \times 6.023 \times 10^{23}2×6.023×1023c3×6.023×10233 \times 6.023 \times 10^{23}3×6.023×1023d4×6.023×10234 \times 6.023 \times 10^{23}4×6.023×1023