Question

how many molecules of methane are in 0.123 mol of methane?​

Answer 1

Answer:

7.4 x 10²² molecules.

Explanation:

Given:

• 1 mole = 6.02.10²³ particles
• 0.123 mol of methane(CH₄)

To find:

• How many molecules of methane are in 0.123 mol of methane.

Solution:

N = n x No

• N = number of gas particles    
• No = Avogadro number (6.02.10²³ particles)    
• n = number of moles  

=> N = 0.123 x 6.022.10²³  

∴ N = 7.4 x 10²² molecules.