Question

how many moles are present in 1.5g of sodium

Answer 1

given weight of sodium = 1.5g

we know, atomic weight of Sodium, Na = 23g/mol

so, number of moles of sodium = given weight of sodium/atomic weight of sodium

= 1.5/23 = 0.06521 mole

hence, number of mole of sodium present in 1.5g = 0.06521

Answer 2

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Given,

Mass of the Sodium(m) = 1.5 g.

Molar mass of the sodium = 23 g/mole.

Using the Formula,

No. of moles = mass/Molar mass.

∴ No. of moles of the sodium = 1.5/23

∴ No. of moles = 0.065 moles.

Hence, the no. of moles of the sodium is 0.065 moles.

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Hope it helps.