Co 4 nguoi vao 1 quan nuoc mua 4 chai pesi. Nguoi thu nhat dua 10000 nguoi thu 2 dua 10000 nguoi thu 3 cung da 10000 nguoi thu 4 lien lay 30000 cua 3 nguoi kia vao tra tien 4 chai pesi. Nguoi chu quan noi 4 chai pesi gia 25000 va tra lai nguoi thu 4 la 5000. Nguoi thu tu di ra va tra lai cho nguoi thu nhat la 1000, nguoi thu 2 la 1000, nguoi thu 3 la 1000, con lai 2000 nguoi thu 4 lay.Nguoi thu nhat chi bo 9000 nguoi thu 2 bo ra 9000 nguoi thu 3 cung bo ra 9000. Vay 3 nguoi chi bo ra co 27000 con 2000 con lai thi nguoi thu 4 giu thi tong so tien chi co 29000. Vay con 1000 con lai o dau
giai gium minh di chua co ai tra loi dung het ca
đừng có lứa nhé thằng thứ4 hắn chẳng bỏ ra đông nào mà hắn còn bỏ túi 7đ của 3 bạn kia
mà bai nay cung hay thiêt
Co 4 nguoi vao 1 quan nuoc mua 4 chai pesi. Nguoi thu nhat dua 10000 nguoi thu 2 dua 10000 nguoi thu 3 cung da 10000 nguoi thu 4 lien lay 30000 cua 3 nguoi kia vao tra tien 4 chai pesi. Nguoi chu quan noi 4 chai pesi gia 25000 va tra lai nguoi thu 4 la 5000. Nguoi thu tu di ra va tra lai cho nguoi thu nhat la 1000, nguoi thu 2 la 1000, nguoi thu 3 la 1000, con lai 2000 nguoi thu 4 lay.Nguoi thu nhat chi bo 9000 nguoi thu 2 bo ra 9000 nguoi thu 3 cung bo ra 9000. Vay 3 nguoi chi bo ra co 27000 con 2000 con lai thi nguoi thu 4 giu thi tong so tien chi co 29000. Vay con 1000 con lai o dau. Tim ra cau tra loi gium minh di
Ko có chai pesi chỉ có pepsi thui
Nên số tiền là ban đầu
Học tốt!
neu ban bi nhot trong can phong co 3 canh cua de thoat khoi can phong do canh cua thu nhat co su tu nhin do trong 2ngay canh cua thu 2 la mot noi co mat nong chi can di qua do se bi no thieu dot thanh tro canh cua thu 3 co mot noi lanh thau tim ban chon canh cua nao
XIN LOI BAN NHA MINH KHONG AN DAU DUOC
bạn kéo xuống dưới cùng có chổ trắng và ghi là uni rồi thấy có chữ Unikey NT rồi nhấn vào biết ghi telex hay vini học lớp mấy
Tron CuA voi oxit cua kim loại M chi co hoa tri (II) theo ti le so moi tuong ung la 1:2 dc hh A. Cho 4,8g A vao ong su, nung nong, roi dan luong khi CO du di qua, ket thúc pu thu dc hh ran B. B phan ung vua du voi 160ml dd HNO3 1,25M, thu dc dd chua 2 muoi va chi co khi NO thoát ra voi the tich la V lia ( o đktc) .Tim kim loại M ,tinh V
CuO + CO -to-> Cu +CO2 (1)
MO + CO -to-> M +CO2 (2)
3Cu + 8HNO3 --> 3Cu(NO3)2 +2NO +4H2O (3)
3M +8HNO3 --> 3M(NO3)2 +2NO + 4H2O (4)
nHNO3=0,2(MOL)
theo (3,4) : nNO=1/4nHNO3=0,05(mol)
=>VNO(đktc)=1,12(l)
theo (1,2,3,4) :nCuO,MO=3/8nHNO3=0,075 (mol)
mà nCuO:nMO=1:2
=> nCuO=0,025(mol)
nMO=0,05(mol)
=>mCuO=2(g)(g)=>mMO=2,8(g)
=>MM=\(\dfrac{2,8}{0,05}=56\)(g/mol)
=> M:Fe
CuO+CO\(\rightarrow\)Cu+CO2
a.....................a(mol)
MO+CO\(\rightarrow\)M+CO2
2a...............2a(mol)
3Cu+8HNO3\(\rightarrow\)3Cu(NO3)2+2NO+4H2O
a............8a/3............................2a/3(mol)
3M+8HNO3\(\rightarrow\)3M(NO3)2+2NO+4H2O
2a.........16a/3...........................4a/3(mol)
nHNO3=1,25.0,16=0,2(mol)
Theo pthh: \(\dfrac{8a}{3}+\dfrac{16a}{3}=0,2\Leftrightarrow a=0,025\left(mol\right)\)
\(\Rightarrow\)VNO=\(\dfrac{2.0,025}{3}+\dfrac{4.0,025}{3}=0,05.22,4=1,12\left(l\right)\)
Ta có: 64.a+M.2a=4,8\(\)mà a=0,025
\(\Rightarrow\)M=40(Ca)
Chúc bạn học tốt!
co mot ong gia . Nha ong co 3 cai cua . Cua thu nhat ong thay mot lua .Cua thu hai ong thay con su tu . Cua thu ba toan la mo . Hoi ong se di cua nao?
co mot nguoi di vao rung gap ba canh cua canh cua thu nhat co hai con dien canh cua thu hai co mot lay dai ma va canh cua thu ba co hai con ma hoi nguoi day di vao canh cua nao
Chao moi nguoi . Toi ten la Nhu Y , toi 11 tuoi , toi hoc sinh lop 6B THCS Hai Lam. mon hoc yeu thich cua toi la tieng anh . Mon the thao yeu thich cua toi la cau long,... . Toi thuong xem TV vao thoi gian ranh . Toi di hoc tu thu 2 den thu 7 . Toi luon luon lam bai tap vao moi buoi sang . Toi rat yeu gia dinh cua minh . Gia dinh cua toi co 7 nguoi : do la ba , me , 3 anh trai , 1 chi dau va toi . Bo cua toi la mot nong dan , me cua toi cung vay . anh trai thu 1 cua toi la mot tho dien , anh trai thu 2 la mot tho cham , anh trai thu ba la mot tho ne. Chi gai toi la mot cong nhan. va toi la mot hoc sinh ,...
ai viet qua tieng anh minh cho 3 tk
nhanh nhe minh can gap
Hi everybody . My name is Nhu Y, I am 11 years old and I am a student of grade 6B junior high school in Hai Lam. My favorite subject is English. My favorite sport is badminton, .... I usually watch TV in my free time. I go to school from Monday to Saturday. I always do my homework every morning. I love my family . My family has 7 people: three, me, 3 brothers, 1 head and me. My husband is a farmer, my mother too.My first brother is an electrician, his second brother is a mechanic, his third brother is a bricklayer. My sister is a worker. and i am a student, ...
Hok tốt
# MissyGirl #
Dịch là:
Hi everybody . My name is Nhu Y, I am 11 years old and I am a student in grade 6B Hai Lam secondary school. My favorite subject is English. My favorite sport is badminton, .... I usually watch TV in my free time. I go to school Monday through Saturday. I always do my homework every morning. I love my family. My family has 7 people: three, mother, 3 brother, 1 sister and me. My father is a farmer, so is my mother. My first brother is an electrician, his second brother is a chameleon, his third brother is a nephew. My sister is a worker. And I'm a student, ...
Hk tốt
hello everyone. My name is Nhu Y.I'm eleven years old. I'm studying in class 6B at Hai Lam lower secondary school. My favourite subject is English. My favourite sport is badminton. I usually watch TV in my free time. I go to school from Monday to Saturday . I alway do homework in morning. I very love my family. There are seven peoples in my family:my father, my mother, my three brothers, a sister in low and me.My father is a farmers, my mother is a farmers too.My first brother is an electrician, my second brother is a (mình ko hiểu), my third brother is a bricklayer.My sister in low is a worker and me is a student.
anh trai thứ 2 bạn làm nghề gì vậy ?Nói rõ ra nhé mình ko hiểu được ^-^
nguoi ta mo 1 voi nuoc vao 1 cai be va 1 voi nuoc thao tu be do ra.neu be khong co nuoc chi mo voi chay vao thi sau 5 gio se day be.neu day be,chi mo voi chay ra thi sau 7 gio be se can het nuoc.neu be khong co nuoc,mo 2 voi cung mot luc thi sau bao lau be se day nuoc?(nhap ket qua la so thap phan gon nhat)
neu co ba o vuong, o thu 1 co 3 so nhu sau: 2, -1, -3. O thu 2 co 3 so: 5, -4, 3, va o cuoi cung cung co 3 so: -5, 6, 9. Vay nguoi ta hoi lam the nao de cho tong cua ba hop duoc bang nhau, nhung cac ban chi duoc di chuyen mot so cua o nay qua o khac thoi nhe, nho day. Ban nao tra loi duoc cho mik ket ban nhe!
