помогите решить задачи с дано и решением 1) по уравнению реакции 2Al+3S=Al2S3 найдите массу и

помогите решить задачи с дано и решением
1) по уравнению реакции 2Al+3S=Al2S3 найдите массу и количество сульфида алюминия Al2S3 если в реакцию вступает 4,5 г алюминия
2) Вычислить массу и количество кислорода прореагировавшего с медью если образовалось 4г оксида меди
- Предмет:
  Химия
- Автор:
  jaquan
- 6 лет назад

Ответы 1

1.даноmAl=4.5gнайтиm n (Al2S3)решение4.5g xg2Al+3S=Al2S354g 150gx=4.5*150/54=12.5gn=m/M=12.5/150=0.08molответ 12.5g и 0.08 моль Al2S32.даноmCuO=4gнайтиm n (O2)решение4g xL2Cu+O2=2CuO128g 32gx=4*32/128=1gn=m/M=1/32=0.03molответ 1г и 0.03моль О2
- Автор:
  paitynfoj0
- 6 лет назад
- 0
Добавить свой ответ

Еще вопросы

Помогите пожалуйста с английским!
Open the brackets using an appropriate Future tense where necessary.
41. You (have) to stay at home until you (get) rid of your bad cough.
42. According to the weather forecast snow (fall) by the end of December.
43. Autumn has come. The trees (lose) their leaves in a few weeks.
44. They (not/ go) to the football match tomorrow, because they (work) at that time.
45. He told me that when he (be) in Japan for five years he (write) a book.
46. By the time you (get) back, Simon (leave).
47. Please, don't wear indoor shoes in the gymnasium, or you (damage) the floor.
48. What you (say) if you (see) her?
49. The Stones (be) married for thirty years in May.
50. I have to be back at 3.30, so I (leave) before lunch.
51. By the end of the month she (work) in this company for three years.
52. Why don't you come with us? We (go) to have a lot of fun.
53. I (take) my exams on Monday so I think I (stay) in on Saturday night.
54. The children (be) really hungry when they (get) home because they (run) around all afternoon without any food.
55. Why don't you come round at 9 o'clock? The children (go) to bed at that time so it (be) nice and peaceful.
56. I (not/go) to speak to her until she (apologize).
57. Martin asked me if I (help) him with English.
58. We (drive) over five hundred kilometers by the time we (reach) the border. 59. You (be) sick if you (eat) more chocolate.
60. Look out! We (go) to hit the car in front.
61. Don't phone too early because I (put) the baby to bed.
62. By the time I (qualify) l (study) law for six years.
63. He was not quite sure when his parents (come) home.
64. Bob didn't know if the time-table for the next week (change).
65. By the time you (get) back, all the food (go).
66. You (not/be) able to enter the building if you (not/have) your identity card. 67. The doctor told Carol that a week in the country (make) her feel better.
68. When I (learn) a thousand English words, I (be) able to read a newspaper? 69. We (return) the reference material to the check-out-desk after we (examine) it.
70. Tom promised that he (phone) us again at the weekend.
71. The film probably (not/finish) until midnight.
72. We were anxious if the police (find) the criminal.
73. Hopefully she (cook) dinner for us by the time we (get) home.
74. I'm sure if we don't get there before seven they (eat and drink) everything. 75. I hope you (not/forget) your promise by tomorrow.
76. You (see) Nick tomorrow by any chance?
77. I'm sure you (recover) by then from the shock of meeting Jason here.
78. I (stay) up late tonight to watch a film on television.
79. By Christmas I (work) in this office for ten years.
80. A new video shop (open) today. I (meet) my friends there this aftemoon.
- Предмет:
  Английский язык
- Автор:
  malaki
- 6 лет назад
- Ответов:
  
  1
- Смотреть
какие строительные материалы есть в Крыму?
- Предмет:
  Окружающий мир
- Автор:
  caden993
- 6 лет назад
- Ответов:
  
  2
- Смотреть
а) 5/9+2/3 б) 1/12+3/4 в) 1/2+3/8 г) 17/1000+81/100
Спасибо большое))) Просто домашней работы много не чего не успеваю ((
А с меня лучший ответ
- Предмет:
  Математика
- Автор:
  walton
- 6 лет назад
- Ответов:
  
  0
- Смотреть
Помогите мне пожалуйста срочнооо!!! Замените помещенное в скобках словосочитание с глаголом деепричастным оборотом и расставьте знаки препинания
- Предмет:
  Русский язык
- Автор:
  jasper29
- 6 лет назад
- Ответов:
  
  2
- Смотреть

Ответы 1

Топ пользователей