python.

N = input(nhap so nguyen N)

if n%2 == 0:

      print('N la so chan')

else:

      print('N la so le')

a)Zn + 2HCl --> Zncl2 + H2

Theo Pư: nZn = nZnCl2 = nH2 = \(\dfrac{4.48}{22.4}\) = 0.2(mol)

                   nHCl = 2nH2 = 0.4(mol)

b) mZn = 0.2*64 = 12.8(g)

c)Cm(dd HCl) = \(\dfrac{0.4}{100\cdot10^{-3}}\) = 4(M)

CuS + H2SO4 --> CuSO4 + H2S

Nãy mình nhìn lộn bảng tính tan:)))

CuSO4 + BaCl2 --> CuCl2 + BaSO4

CuCl2 + Na2CO3 --> CuCO3 + Nacl

CuCO3 t⁰ --> CuO +CO2

CuO + HNO3 --> Cu(NO3)2 + H2O

K2SO4+Ba(NO3)2 --> KNO3 +BaSO4

AgNO3 + HCl -->AgCl + HNO3

Fe + CuCl2 không pư

NaOH + KNO3 --> NaNO3 +H2O

CaCO3 + HCl --> CaCl2 + CO2 + H2O

1. He is very lazy so he often get bad marks

2. I have studied E for 5 years

3. I wish i had a computer

4. Plastic bags are recycled

5. I wish it was not cold today

6. They started working in that factory in 2001

7. She is interested in swimming

8. Shall we go to the cinema tonight

9. I am used to going to bed late

10. Going out with friends at the weekends is interesting

11. She went out without a word

a) R_TĐ = 40Ω

b)I₃ = 0.1A

   I₂ = I₁ = 0.05A

   U₃ = 266.67V

   U₁ = 177.78V

    U₂ = 88.89V

13. A

14. A

15. C