Question

Calculate the number of molecules in 56g of CH4?

Answer 1

Answer:-

2.1077×10²⁴ molecules

Explanation:-

• Molar mass of Carbon (C) = 12g

• Molar mass of Hydrogen (H) = 1g

Molar mass of CH₄ :-

= 12+1×4

= 16g

Number of moles present in 56g of CH₄ :-

= Given Mass/Molar mass

= 56/16

= 3.5 moles

Hence, 3.5 moles are present in

56g of CH₄ .

• Avogadro Number = 6.022×10²³

No of molecules:-

= No of moles × Avogadro Number

= 3.5×6.022×10²³

= 21.077×10²³

= 2.1077×10²⁴ molecules

Thus, 2.1077×10²⁴ molecules, are present in 56g of CH₄ .

Answer 2

Answer

2.1077 × 10 power 24