engineering recuitment BPSC AE Mock Test 2025 General Science Chemistry

ऑक्सीजन के एक अणु का द्रव्यमान ______ है।

1
2.3 × 10-23 ग्राम
2
3.3 × 10-23 ग्राम
3
4.3 × 10-23 ग्राम
4
5.3 × 10-23 ग्राम
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