tinh khoi luong AlO2 can dung de san xuat 2,7 tan nhom voi hieu xuat khoang 80%
Tinh khoi luong quang hematit chua 60% Fe2O3 can thiet de san xuat duoc 1 tan gang chua 96% sat. biet hieu suat cua qua rinh san xuat la 80%
tinh khoi luong quang hematit chua 60% Fe2O3 can thiet de san xuat duoc 1 tan gang chua 96% sat. biet hieu qua cua qua trinh san xuat la 80%
TIH KHOI LUONG BENZEN CAN DUNG DE DIEU CHE 39,25 G BROMBENZEN .BIET HIEU XUAT PHAN UNG DAT 85%
tinh khoi luong ruou etylic can dung de dieu che 200g dd ch3cooh tren bang phuong phap len men voi hieu suat 80%
Hoa tan 8,1g nhom voi h2so4 tao ra al2(so4)3 va h2
A) tinh Vh2
B)khoi luong al2(so4)3
C) de hoa tan vua du luong nhom can 200g dd h2so4
Tinh nong do % dd al 2(so4)3
2Al + 3H2SO4 \(\rightarrow\)Al2(SO4)3 + 3H2
nAl=\(\dfrac{8,1}{27}=0,3\left(mol\right)\)
Theo PTHH ta có:
\(\dfrac{3}{2}\)nAl=nH2=0,45(mol)
VH2=0,45.22,4=10,08(lít)
\(\dfrac{1}{2}\)nAl=nAl2(SO4)3=0,15(mol)
mAl2(SO4)3=342.0,15=51,3(g)
C% dd Al2(SO4)3=\(\dfrac{51,3}{8,1+200-0,45.2}.100\%=24,75\%\)
Mot doi san xuat gom18 cong nhan chia lam hai nhom , nhom thu nhat co 10 cong nhan ,trung binh moi cong nhan san xuat duoc 52 san pham trong mot tuan. De trung binh moi nguoi trong doi san xuat duoc 56 san pham trong mot tuan thi nhom con lai trung binh moi nguoi phai san xuat so san pham la ?
nho thi dua 1 nha may da hoan thanh ke hoach ca nam khoi luong san ham thuc hioen cua 3 quy dau ti le voi 2/1/10,2/1/4,2/2/5 con quy 4 thuc hien duoc 28/100 ke hoch ca nam......hoi ca nam nha may san xuat bao nhieu tan hang hoa neu quy 3 nha may san xuat hon quy 1 là 48 tan
nho thi dua 1 nha may da hoan thanh ke hoach ca nam khoi luong san ham thuc hioen cua 3 quy dau ti le voi 2/1/10,2/1/4,2/2/5 con quy 4 thuc hien duoc 28/100 ke hoch ca nam......hoi ca nam nha may san xuat bao nhieu tan hang hoa neu quy 3 nha may san xuat hon quy 1 là 48 tan
van dung nhung hieu biet ve anh huong cua moi truong doi voi tinh trang so luong va muc phan ung , em hay de xuat mot so bien phap giup nang cao nang suat cay trong va vat nuoi