Exercise 2 . Underline one mistake in each sentence and correct it. 1. I live on the twenty-one floor of City Tower.=> ………………………………………………………………………………2. Do your brother live in a small house?=> ………………………………………………………………………………3. There are two high tower near my house.=> ………………………………………………………………………………4. Ha noi is...
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Exercise 2 . Underline one mistake in each sentence and correct it.
1. I live on the twenty-one floor of City Tower.
=> ………………………………………………………………………………
2. Do your brother live in a small house?
=> ………………………………………………………………………………
3. There are two high tower near my house.
=> ………………………………………………………………………………
4. Ha noi is one of the most beautiful city in Viet Nam.
=> ………………………………………………………………………………
5. These cities is large and busy.
=> ………………………………………………………………………………
6. Living in a big city is more busy than living in the countryside.
=> ………………………………………………………………………………
7. This building is big than that one.
=> ………………………………………………………………………………
8. What do your hometown like? – it is beautiful.
=> ………………………………………………………………………………
9. My best friend, Lisa likes living at the mountains.
=> ………………………………………………………………………………
10. It is a nice and big city, because I want to live there.
=> ………………………………………………………………………………
a. PTHH: \(2SO_2+O_2\rightarrow^{t^o}_{V_2O_5}2SO_3\) (đoạn này Latex OLM đánh nhiều hơi rối nên không hiểu thì hỏi nhé)
\(SO_3+H_2O\rightarrow H_2SO_4\)
\(300ml=0,3l\)
\(\rightarrow n_{H_2SO_4}=1.0,3=0,3mol\)
Theo phương trình \(n_{O_2}=n_{SO_3}=n_{H_2SO_4}=0,3mol\)
\(\rightarrow m_{SO_2}=64.0,3=19,2g\)
b. PTHH: \(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)
\(n_{Al_2O_3}=\frac{15,3}{102}=0,15mol\)
Xét tỉ lệ \(n_{Al_2O_3}>\frac{n_{H_2SO_4}}{3}\)
Vậy \(Al_2O_3\) dư
Theo phương trình \(n_{Al_2\left(SO_4\right)_3}=\frac{1}{3}n_{H_2SO_4}=0,1mol\)
\(\rightarrow C_{M_{Al_2\left(SO_4\right)_3}}=\frac{0,1}{0,3}=0,33M\)