Nₐ=6.02*10²³ mol⁻¹
n(Na₂O)=0.5 mol
n(Na⁺)=2n(Na₂O)
N(Na⁺)=n(Na⁺)Nₐ=2n(Na₂O)Nₐ
N(Na⁺)=2*0.5*6.02*10²³=6.02*10²³ ions
Answer:
waves that move through matter only are called mechanical waves.
waves that move through space only are called electromagnetic waves.
Answer:
— Washing with soap and water is an effective way to destroy and dislodge many microbes
Explanation:
- Soap actually kill germs on our hands, it breaks them up and removes them
- .But soap molecules have two different ends to them.
- One end is attracted to water molecules – this is called hydrophilic
- – and the other end loves oil and fat molecules – this is called hydrophobic.
- Soap is able to bind to the oils on our hands, and then mix with the water to wash all the germs away.