Question

How many copper atoms are in a pure copper statue with a mass of 154 kg ?

Answer 1

2423Answer

Step-by-step explanation

Given:

Mass of copper = 154 kg

Convert kg to gram by multiplying by 1000

154 kg x 1000 = 154000 grams

From Avogadro's constat, 1 mole of any substance contains 6.022×10²³ atoms

The molar mass of copper, that is, the amount of mass that copper contains in one mole, is 63.546 g/mol. So, 154000 g of copper are contained in:

`154000g*\frac{1\text{mol}}{63.546\text{ g}}=2423.441287\text{ mol}`

Since 1 mole of copper contains 6.022×10²³ atoms,

Therefore 2423.441287 moles of copper will contains: