HOC24
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1). My father said that he would go to Hue the following week.
2). Hoa said to me her mother would give she a gift.
2Al + 3H2SO4 → Al2(SO4)3 + 3H2
2 3 1 3
0,2 0,3
nAl=\(\dfrac{5,4}{27}\)=0,2(mol)
Ta có: nH2 = \(\dfrac{0,2.3}{2}\)= 0,3(mol)
⇒ VH2 = n . 22,4 = 0,3 . 22,4= 6,72l
Ủa??? kì z??
1). He said he visited his parents every week.
2). She said that she would visit her grandfather the next day.
1). My sister said to me she was going to leave the following week.
2). He said to her he would phone she the next day
Mr.An said that he wanted to go swimming
Vì R1 song song với R2 nên:
\(\dfrac{R1.R2}{R1+R2}\)hay \(\dfrac{8.2}{8+2}\)= 1,6Ω
Cường độ dòng điện chạy qua mạch chính là:
I=\(\dfrac{U}{R}\)= \(\dfrac{3,2}{1,6}\)=2A
→ Vậy cường độ dòng điện chạy qua mạch chính là 2A.
bài giải bạn nhé, chúc bạn học tốt!
Nam said to her he couldn't swim well