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How Many Moles Are There in 34.5 G of Sodium ? (Atomic Mass of Na = 23 U) - Science

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Short Note

How many moles are there in 34.5 g of sodium ? (Atomic mass of Na = 23 u)

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Solution

Mass of zinc = 10g

gram atomic mass of zinc = 65g

We know that one mole of zinc contains 6.022 × 1023 atoms of zinc.

65g of zinc contain = 6.022 × 1023 atoms

Therefore, 10g of zinc contain = 10 × 6.022 × 1023/65 = 9.264 × 1022 atoms

Hence, 10 grams of zinc contain 9.264 × 1022 atoms.

Concept: Mole Concept
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APPEARS IN

Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Short Answers | Q 19 | Page 172

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