Question

How many molecules are there in 20gram of CaCO3​

Answer 1

Answer:

1.2044 × 10²³ molecules

Explanation:

Given mass of CaCO₃ = 20 g

Molar mass of CaCO₃ = 40 + 12 + 3(16)

= 100 g/mol

Number of moles of CaCO₃ = Given mass of CaCO₃/Molar mass of CaCO₃

= 20/100 = 0.2 moles

As we know that,

Avogadro constant = 6.022 × 10²³

Now,

Number of molecules of CaCO₃ = Number of moles of CaCO₃ × Avogadro constant

= 0.2 × 6.022 × 10²³

= 1.2044 × 10²³ molecules

Answer 2

Answer:

Explanation:

Here is the answer