1) oxh hoàn toàn một m gam hỗn hợp X gồm (ethane,ethylene,axetylene) thu được 5,9496 lít khí CO2 (đkc) và 5,4 g H20. Tính m

2) Dẫn từ từ 0,04 mol hỗn hợp gồm (C2H4, C3H6) vào bình đựng dd Br2 dư. Sau khi kết thúc thí nghiệm có m gam Br2 đã phản ứng . Tính m

3) Hấp thụ hoàn toàn 0,05 mol hh X ( gồm 2 alkyne là đồng đẳng kế tiếp ) vào bình đựng dd br2 dư. Kết thúc thí nghiệm khối lượng br2 tăng thêm 1,79g . Tính khối lượng của alkyne có phân tử khối nhỏ hơn có trong 0,1 mol hh X

một ô tô đi từ a đến b với vận tốc 60km/h và từ b đến a với vận tốc 80km/h. thời gian cả đi lẫn về là 1 giờ 45 phút. tính thời gian đi, thời gian về và độ dài quãng ab

1. We feel very proud of the poeple who_______ to charity. It's really great.

A. spend           B.devote            C. donate          D. lend

(giải thích với ạ!!! thanksss.)

2. Mandy and her fiancé have _________ after their quarrel last week.

A. let down           B. fallen out with        C. made up           D. dealt with

(giải thích với ạ!!! thanksss")

There is _______water in the bottle.
little B. a few C.  any                  D. many
I have ______money, not enough to buy groceries.
a lot of B. little C.  any                  D. many
I have ________money, enough to buy a ticket.
a lot of B. little C.  many               D. a little
She has _______books, not enough for references.
few B. a few C.  many               D. little
She has _______books, enough to read.
many B. few C.  a few               D. a little
There _______ traffic on the street at rush hours.
are too many B. is too much C.  are too a lot               D. are too little
He bought _______furniture for her new apartment which she has bought recently.
many B. few C. much                D. a few
_________ the people I work with are very friendly.
some B. some of C. a little of                    D. a few
_________these money is mine.
some B. a few of C. many                D. none of  
We didn’t spend __________money
many B. some C. much                D. a few
There are _________people there.
too many B. too a little C. too much                   D.too little
Do you know ________people in this neighbourhood.
much B. a little C. many                D.little
Would you like _________to eat?
something B. anything C.everything                   D.nothing
I can’t find it ___________.
somewhere B. nowhere C.everyplace                   D.anywhere
I like him __________.
so many B. any much C.so much            D.so some
We must be quick. There is ________time left.
much B. many C.a lot of              D. little
Let’s go and have a drink we have _______time left.
much B. a little C.a lot of              D. little
There is a telephone in _______room of the house.
every B. each C.some                 D. A and B are correct
You should read _______sentence carefully.
every B. some C.many                 D. a lot of
_________ has right to vote.
something B. everyone C.many people      D. some people