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TT
5 tháng 8 2018
â : Viết phương trình
H2SO4 + NaOH = H2O + NaSO4
b: H2SO4 + NaOH + H2O +NaSO4
Theo đề ta có :
n H2SO4 = m H2SO/ M H2SO4 = 150/98 = 1,5 ( mol )
theo pt ta có : n H2SO4 = n NaOH = 1,5 ( mol )
Vay : V NaOH = n . 24 = 1,5 . 24 = 12l
khối lượng chất : m NaOH = n . M = 1,5 . 70 = 105g
mk giải theo những gì mình bít ....mk ko phải chuyển hóa
HA
3
XD
1 tháng 12 2018
1. It was kind of them to support the victims after the disaster.
2. It's neccessary to value the improved living conditions we have today
3. It was stupid of you to cross the road without looking left and left.
4. It's afraid to go into the lift alone
5. It is important for all of us to follow the instructions carefully
6. It is certain to be able to build the country into a powerful one.
7. It is confident to speak English with the foreigners
8. It was kind of them to show us the way to train station
9. It was very clever of him to use a long stick to get some fruits
10. It is not easy for you to find a park space in the city center
14 tháng 11 2018
Đáp án: Last summer, Liz went to Nha Trang with her parents.
3 tháng 9 2018
E4: Fill each blank in the conversation with a, an, some or any.
(1) some
(2) A
(3) some
(4) any/some
(5) A
(6) some
(7) an
MC
26 tháng 6 2018
He's very ambitious for his children.
The average height of a man in the U.S. keeps changing.
His build and his style are suited to hill running, but it also seems to be something he wants to do.
He was praised for his extremely energetic and effective leadership.
A friendly sibling rivalry that drives them to work a little bit harder and compete a little longer can only serve as a benefit to both the sisters and the team.
English is really helpful for our future.
A village has been inundated with Christmas trees after kind-hearted locals answered an appeal.
They are very open-minded , prepared to consider anything, wholly without prejudice.
He is a reserved, almost taciturn man.
VB
4 tháng 1 2019
my class suggested ...going... to Phong Nha Cave since it is a famous natural wonder of Viet Nam
tiếng nhật đúng ko bn
シロオフィシャル : Shiro Official