Какое из веществ содержит больше серы : а) резина б) эбонит ? Дайте краткую характеристику этим веществам .

Написать программу, которая вводит массив из N вещественных чисел, а затем заменяет в нём все элементы, превышающие данное число Z, этим числом. Вывести на экран полученный массив и количество замен. Протестировать программу на следующих исходных данных: а) Z=10 Массив: 1,2 2,6 3 -4,5 11 10,2 3,2 87 -15 б) Z=-2 Массив: 0 -3,1 11 -7,9 -2,1 -1,9 4

1.Закончите уравнения химический реакций. Назовите продукты реакции.

CH3-CH-C=O+H2-->

           |      |

        CH3 H

CH3-CH-CH3+O2-->

            |

          OH

CH3-CH2-C=O+H2O-->

                    |

                    O-CH3

CH3-CH-C=O+CaO-->

           |      |

       CH3 OH

2.Осуществите превращения:

                                     +H2, N    +H2SO4(к), t>140        +HCL     +NaOH(водн.р-р)  +Na

CH3-CH2-CH2-C=O-->    ?     -->            ?                      --> ?        -->     ?                      -->?

                              |

                             H

10 Put the verbs in brackets into the past perfect simple or the past perfect continuous.

A: Are you alright? You look tired.

B: Yes, I am. I didn’t sleep very well. I 1) ...had just gone... (just/go) to sleep last night when a lot of noise outside woke me up. I got up and went to the window. I 2)...... (stand) there for a few minutes when two police cars stopped out¬side my house. I went downstairs and a policeman told me that two prisoners 3)......... (escape) from prison and were hiding in the area.

A: Did they catch them again?

B: Yes, but I didn’t sleep very well after that.

A: Did you do anything exciting at the weekend?

B: Not really. By the time I 1)......... (do) my shopping and cleaned the house, Saturday was nearly over. What about you? Well, I 2)......... (plan) to go out with my friend but she was late and I 3) …….(wait) for nearly two hours before she phoned me to say she couldn’t come after all. That’s a shame. Next weekend, we should go somewhere nice together.