Đáp án:
Giải thích các bước giải:
CO2+2NaOH->Na2CO3+H2O
0,15----0,3---------0,15
nCO2=3,36\22,4=0,15 mol
=>mNaOH=0,3.40=12g
=>m Na2CO3=0,15.106=15,9g
$n_{CO_2}=\dfrac{3,36}{22,4}=0,15mol \\PTHH : \\2NaOH+CO_2\to Na_2CO_3+H_2O \\ a.Theo\ pt : \\n_{NaOH}=2.n_{CO_2}=2.0,15=0,3mol \\⇒m_{NaOH}=0,3.40=12(g) \\b.Theo\ pt : \\n_{Na_2CO_3}=n_{CO_2}=0,15mol \\⇒m_{Na_2CO_3}=0,15.106=15,9g$
Fill each of the blanks with a suitable word to complete the following Hi! I'm Dirk and I live in Ghent, Belgium. Ghent is (1)___ in the middle of the Flanders. I speak Dutch like most people in this part of the country. In the southern part of the country people speak French. Ghent is not the (2) ___ city, you probably know that it is Brussels but I love my city. Ghent is also very famous for its horticulture. Many growers work in this area. There are also some beautiful flower festivals or exhibitions (3)___ are a real "must". Do you know that Charles V was born in Ghent? Currently, Ghent is probably best known (4)___ the 'Gentse Feesten', which is 10 days of festivity in the city centre every year in July. It is (5)___third biggest city festival in Europe. Besides that, it is also well-known (6)___of the many historic sites and houses which stood the test of time. And in contrast to Bruges, Ghent still is a major city (7)___ots of other non-touristic activities going round. How The last thing I'd like to mention is its university, which consistently (8) ___ in the top 100 of several global rankings. There are many other peculiar things in Ghent, but the above (9) ___ probably the most famous ones. Can you tell me a little (10) ___about your hometown? Next time I'll tell you about my family and my hobbies.
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