Предмет: Химия, автор: Hayesafa

1)определить валентность хрома потего оксиду, у которого массовая доля метала составляет 68.42%?

2)Сколько мл и какого вещества останется в избытке при взрыве в эвдиометре смеси 24 мл Н2 и 15 мл 02?

3)Какой обьем воздуха (н.у) требуется для сгорания 14 гр бутена? если обьемная доля кислорода в воздухе 21%?

Ответы

Автор ответа: DJToxa

Решение в фото......:

Приложения:

Hayesafa: Спасибо огромное. все так понятно

DJToxa: не за что))

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: География, автор: rixxiz

Запропонуйте цікаву туристичну мандрівку чи в Антарктиду , чи в Австралію

1 год назад

Предмет: Английский язык, автор: antoha230707

Прошу помочь!!!Extra grammar practice revision Future forms; Future continuous, future perfect simple and future perfect continuous 1 Circle the correct option. 1 According to the timetable, our train..........tomorrow afternoon. a will leave. b leaves 2 I've decided philosophy and politics at university. a I'm going to study b I study 3 Space tourism.......... possible in the not too distant future. a is b will be 4 The heads of department......... tomorrow to discuss the issue. b meet a are meeting 5 Based on the results of the survey, these products .........a great success. a are being b are going to be 2 Complete the text with the correct form of the verbs given. According to some predictions, flying cars (1) ..(be) available in the next 15 years or so. Several companies are developing prototypes. Terrafugia is one company. Their car (2).. ............ (seat) four people and (fly) with wings similar to a plane. (hope) to sell a (3) Aeromobil (4) model as early as 2017. This prototype works like a normal car, but has collapsible wings so it can fly. Both ideas are exciting. However, I don't think they (5). (become) a normal form of transport any time soon because the first models (6).... (be) cheap. 3 Find and correct the mistakes. 1 In the future, we'll be see jetpacks as a common form of travel. 2 In 2030 people will travelling longer distances more quickly. 3 Tomorrow night I be flying to New York. 4 By January a British astronaut will live on the International Space Station. 5 This weekend my brother will be cycle from London to Edinburgh. 2nd Edition 4 Circle the correct alternative. 1 At 1 o'clock we will have been walking/will have walked for five hours without stopping!. Are we nearly there? 2 Next month they will have lived/will have living in their house for a year. 3 It's my parents' wedding anniversary next week. They will have been married/will have been marrying for five years. 4 Just think, tomorrow James will have been/will have been being on the boat for a week. 5 It arrives at 5.10. It's almost 5 o'clock. By then I will have been waited/will have been waiting for the bus for half an hour. 5 Complete the sentences with the correct form of the verbs given. 1 By 2030 DVDs (disappear) 2 B2 Unit 3 3 By 2020 humans (not visit) By this time next year I at university for two years and have one more year to go. (study) 4 Next year that pilot. one thousand flights. (make) 5 By four o'clock w....................... hours! (travel) 6 Complete the text with these verbs. Mars. ................... space. He flies is blasting off will be carrying out. will be spending will be waiting will become. will have been waiting will have returned. will soon be flying will spend This page has been downloaded from www.macmillangateway2.com Photocopiable Ⓒ Macmillan Publishers Limited 2016 over for 24 Making history (an article from 2015) British astronaut Tim Peake (1). into space. He (2). the first British European Space Agency (ESA) astronaut to live on the International Space Station. When Tim Peake sets off, ESA (3).... forty years to see this happen. ............. to In December, Peake (4) Kazakhstan where he (5) two weeks in quarantine with his crewmates so he doesn't get sick. On 15th December he (6).................... five months on board (7).. the International Space Station where he (8).. By this time next year, he (9) to Earth and will no doubt have lots of stories to tell. 1, for one, (10). to hear them. a series of experiments. 1 of 1

1 год назад

Предмет: Геометрия, автор: Аноним

ров'язати задачі за готовими малюнками

1 год назад

Предмет: Литература, автор: Dolopomo

Сколько лет Шекспир прожил в Лондоне?

7 лет назад

Предмет: Математика, автор: Аноним

среднее арифметическое трех чисел-29
найдите эти числа если первое число в 2,5 раза больше третьего а второе в 0,5 раз(-а) больше третего
первое число равно-
второе чило ровно-
третье число ровно

7 лет назад