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#STATEWISE NTSE MCQ's CHEMISTRY Percentage purity of a sample | Class 9th MCQ - Pre-NTSE Quiz

#STATEWISE NTSE MCQ's CHEMISTRY

Percentage purity of a sample of gold is 85% how many atoms of gold are present in 1g sample? (Atomic mass of gold=197 u)
Anonymous Quiz
18%
2.6×10²¹
44%
2.6×10²³
29%
3.0×10²¹
9%
4.5×10²¹
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