Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Chemistry Some Basic Concepts of Chemistry Mole Concept

नाइट्रोजन गैस के 0·5 मोल का द्रव्‍यमान क्‍या है?

1

7 g

2

14 g

3

28 g

4

6·02 × 10²³ g

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