Question

no. of atoms in 0.635g Cu is​

Answer 1

The atomic mass of Copper ( Cu ) is 63.5 u . There fore , the molar mass of Copper is 63.5 g . So , 63.5 g of Cu will contain 6.022 * 10^23 . So , 0.635 g of Cu will contain 6.022 * 10^23 / 100 = 6.022 * 10^21

Answer 2

Explanation:

Given Mass = 0.635 g

Molar Mass of Cu = 63.5 g

No of moles = Given Mass/Molar Mass

No of moles = 0.635/63.5

= 0.01 moles

No of atoms in 1 mole = 6.022 *10²³

No of atoms in 0.01 moles = 0.01 *6.022*10²³

= 6.022 *10²¹

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