late next friday so she can't go the the party

is too expensive so I can't buy it
it was hot, I turned on the air conditioner
to the club because of her illness
her exam because she worked hard
on the air conditioner because it was hot
the hard rain, we stay at home
being sick, she couldn't go to shcool yesterday
Nga's tiredness after her trip, she went to bed early
waking up late, Na didn;t have time for breakfast

5 visitors

22 picnicking

23 hungry

24 villagers

31 terribly

32 enjoyable

unpollute

deforestation

environmental

pollution

conservationists

prevention

extremely

environmentalist

protection

seriously

poisonous

Chữ hợi hẹp nên khó nhìn, bn cho to ra nhé

Cũng ko khác cho lắm

PTHH: Na₂SO₃ + 2HCl ---> 2NaCl + H₂O + SO₂

Ta có: \(n_{SO_2}=\dfrac{6,2}{22,4}\approx0,3\left(mol\right)\)

Theo PT: \(n_{HCl}=2.n_{SO_2}=2.0,3=0,6\left(mol\right)\)

Ta có: \(C_{M_{HCl}}=\dfrac{0,6}{V_{dd_{HCl}}}=0,2M\)

=> \(V_{dd_{HCl}}=3\left(lít\right)\)

câu 1:

a)3Fe+2O₂-->Fe₃O₄            HH

b)4P+5O₂-->2P₂O₅        HH

c)2Al+6HCl-->2AlCl₃+3H₂        Thế

d)2K+2H₂O-->2KOH+H₂         Thế

f) Cu+2AgNO₃-->Cu(NO₃)₂ +2Ag            Thế

\(\left\{{}\begin{matrix}R1=U1^2:P1=220^2:44=1100\Omega\\R2=U2^2:P2=220^2:66=733,33\Omega\end{matrix}\right.\)

Bóng đèn sáng bình thường, vì: \(U=U1=220V\)

\(\left\{{}\begin{matrix}P=UI=220\cdot\left(\dfrac{44}{220}+\dfrac{66}{220}\right)=110W\\Q_{toa}=A=Pt=110\cdot30\cdot60=198000\left(J\right)\end{matrix}\right.\)

\(A1=P1\cdot t1=66\cdot2\cdot30=3960Wh=3,96kWh\)

\(\Rightarrow T=A1\cdot2200=3,96\cdot2200=8712\left(dong\right)\)

\(R_Đ=\dfrac{U_Đ^2}{P_Đ}=\dfrac{220^2}{44}=1100\Omega\)

\(R_q=\dfrac{U_q^2}{P_q}=\dfrac{220^2}{66}=\dfrac{2200}{3}\Omega\)

\(R_{tđ}=\dfrac{R_Đ\cdot R_q}{R_Đ+R_q}=\dfrac{1100\cdot\dfrac{2200}{3}}{1100+\dfrac{2200}{3}}=440\Omega\)

\(\Rightarrow U_Đ=U_q=U_m=440\cdot0,5=220V\)

\(I_{Đđm}=\dfrac{P_Đ}{U_Đ}=\dfrac{44}{220}=0,2A=I_Đ\)

Đèn sáng bình thường.