Question

Calculate the number of Cu atoms in 0.635 g of Cu

Answer 1

Answer:

Explanation:

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

Answer:

6.022*10^21

Explanation:

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