kmb1960679
?>

выбрать правильный ответ Example: My parents _C ___ in China. A are born B were born C was born 1 She __B___ had a bank account for five years now. A had B has C have 2 His latest film isn’t _B the last one I saw. A as good than B better C as good as 3 Anne How long for me? Bill For half an hour! A are you waiting B do you wait C have you been waiting 4 I’ve been playing football I was six years old. A when B since C for 5 Alex When on holiday to Thailand? Beth Two years ago. A did you go B have you gone C you went 6 Let’s eat in this restaurant. It’s than the other one. A less expensive B more cheaper C as expensive 7 Amy Can I speak to Peter, please? Bob Sorry, he out. A has just been B just has been C has just gone 8 You look tired. What ? A you have been doing B have you doing C have you been doing 9 Have you ? There’s blue paint in your hair! A been painting B painting C painted 10 He was teacher I’ve ever had. A the worse B worst C the worst 11 He saved enough money yet. He needs another 500 euros. A hadn’t B hasn’t C has 12 The journey didn’t take as long we thought. A that B than C as 13 How long have they going out together? A been B already C be 14 Have you been to South America? A ever B yet C never 15 We’ve been living in this house four years now. A from B since C for 16 I haven’t finished my exams . I’ve got two more next week. A already B yet C soon 17 How much money you earn last month? A did B have C do 18 I love Venice. It’s beautiful city I’ve been to. A the B the most C most 19 I haven’t seen you last summer. How are you? A since B for C until 20 Alice Would you like a cup of coffee? Bruno No, thanks. I’ve one. A yet had B just had C just have

Химия

Ответы

Rjkjneirbyf555
Оксид фосфора (V) (фосфорный ангидрид) представляет собой очень гигроскопичное вещество белого цвета. Является сильнейшим дегидратирующим агентом. Существует в аморфном (в виде хлопьев), стеклообразном и кристаллическом состояниях. При нагревании кристаллический оксид фосфора (V) возгоняется. Плавится только под избыточным давлением, переходя при этом в легкоподвижную жидкость. При дальнейшем нагревании полимеризуется, при охлаждении жидкости образуется стеклообразный продукт состава .Оксид фосфора (V) проявляет кислотные свойства, а значит не вступать в реакции взаимодействия с кислотами, т.е. записать уравнение реакции по схеме [P2O5 + HCl = ?] невозможно. Энергично реагирует с водой, щелочами. Легко галогенируется. Восстанавливается фосфором. Образует пероксосоединения.
   
   
   
   
Оксид фосфора (V) в промышленных масштабах получают сжиганием фосфора в избытке кислорода или воздуха:
   
Yelena Kotova
1) Li+O2=Li2O
Li2O+H2O=LiOH
LiOH+HCl=LiCl+H2O
Li^+ + OH^- + H^+ + Cl^- = Li^+ + Cl^- + H2O
OH^- + H^+ = H2O
2) CaCO3=CaO+CO2
CaO+2KNO3=Ca(NO3)2+K2O
Ca(NO3)2+Na2CO3=CaCO3 (осадок) +2NaNO3
Сa^+2 + 2NO3^- + 2Na^+ + CO3^-2 = Ca^+2CO3^-2 +2Na^+ +2NO3^-
Ca^+2 + CO3^-2 = Ca^+2CO3^-2
CaCO3=CaO+CO2
CaO+2HCl=CaCl2+H2O
3)Na+H2O=NaOH
Ba+S=BaS
2Fe+3Cl2=2FeCl3
2Fe+6HCl=2FeCl3+3H2
2Al+3Cl2=2AlCl3
4) 1. H^+Cl^- (10 г)+Na^+OH^-=Na^+Cl^-(x г) +H2O
2.M(HCl)=36,5 г/моль
M(NaCl)=58,5 г/моль
3.m(HCl)=36,5 г
m(NaCl)=58,5 г
4. Составим пропорцию:
10 г - х г
36,5 г - 58,5 г
10/36,5=х/58,5
х=10*58,5/36,5=16 г
ответ: образуется 16 грамм соли

Ответить на вопрос

Поделитесь своими знаниями, ответьте на вопрос:

выбрать правильный ответ Example: My parents _C ___ in China. A are born B were born C was born 1 She __B___ had a bank account for five years now. A had B has C have 2 His latest film isn’t _B the last one I saw. A as good than B better C as good as 3 Anne How long for me? Bill For half an hour! A are you waiting B do you wait C have you been waiting 4 I’ve been playing football I was six years old. A when B since C for 5 Alex When on holiday to Thailand? Beth Two years ago. A did you go B have you gone C you went 6 Let’s eat in this restaurant. It’s than the other one. A less expensive B more cheaper C as expensive 7 Amy Can I speak to Peter, please? Bob Sorry, he out. A has just been B just has been C has just gone 8 You look tired. What ? A you have been doing B have you doing C have you been doing 9 Have you ? There’s blue paint in your hair! A been painting B painting C painted 10 He was teacher I’ve ever had. A the worse B worst C the worst 11 He saved enough money yet. He needs another 500 euros. A hadn’t B hasn’t C has 12 The journey didn’t take as long we thought. A that B than C as 13 How long have they going out together? A been B already C be 14 Have you been to South America? A ever B yet C never 15 We’ve been living in this house four years now. A from B since C for 16 I haven’t finished my exams . I’ve got two more next week. A already B yet C soon 17 How much money you earn last month? A did B have C do 18 I love Venice. It’s beautiful city I’ve been to. A the B the most C most 19 I haven’t seen you last summer. How are you? A since B for C until 20 Alice Would you like a cup of coffee? Bruno No, thanks. I’ve one. A yet had B just had C just have
Ваше имя (никнейм)*
Email*
Комментарий*

Популярные вопросы в разделе

Геннадьевна
ogofman
nikziam
klimovala2
Neveselova
minchevaelena23
Fedorov1283
ekaterinkat
helenya
Vitproficosmetics
ktatarinova
optima3559
boldyrevanastia22
alenkadon6
хуйдрочил_Анастасия