<u>Answer:</u> The moles of KHP in the sample is ![9.79\times 10^{-4}mol](https://tex.z-dn.net/?f=9.79%5Ctimes%2010%5E%7B-4%7Dmol)
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
![\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%7BMolar%20mass%7D%7D)
Given mass of KHP = 0.2000 g
Molar mass of KHP = 204.22 g/mol
Putting values in above equation, we get:
![\text{Moles of KHP}=\frac{0.2000g}{204.22g/mol}=9.793\times 10^{-4}mol](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20KHP%7D%3D%5Cfrac%7B0.2000g%7D%7B204.22g%2Fmol%7D%3D9.793%5Ctimes%2010%5E%7B-4%7Dmol)
Hence, the moles of KHP in the sample is ![9.79\times 10^{-4}mol](https://tex.z-dn.net/?f=9.79%5Ctimes%2010%5E%7B-4%7Dmol)
Answer:
let's do no.3
Na2O+H2SO4 > Na2SO4 +H2O
Al2O3+3H2SO4>Al2(SO4)3+3H2O
the three before the sulphuric acid is such that the equation balances on both ends
...hope this helps