2017 · Q18
What is the number of atoms in 46 g of sodium-23 (N = Avogadro constant) ?
General KnowledgeChemistry
- AN/2
- BN
- C2N
- D23N
Explanation
Sodium-23 has molar mass 23 g/mol, so 46 g = 2 mol. The number of atoms is 2 × N (Avogadro constant). Hence C.