Предмет: Химия, автор: valushavolkodav

яка формула відповідає сполуці якщо вона складається з атома алюмінія атома невідомого елемента і чотирьох атомів оксигену а її відносна молекулярна маса дорівнює 122

Ответы

Автор ответа: zubareva45
4

Ответ:

Mr(AI+X+O₄)=122

X=Mr-Ar(AI)-4Ar(O)=122-27-(4×16)=122-27-64=31

Відносну атомну маса  31 має фосфор,  формула сполуки AIPO₄ фосфат алюмiнiя.

Объяснение:

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Прочитай текст. Определи, какие из нижеприведенных утверждений соответствуют содержанию текста (1- True), какие не соответствуют (2-False). Обведите номер выбранного вами варианта.

What is the UK?

There are three countries in Great Britain: England, Scotland and Wales. But the United Kingdom has four parts: England, Scotland, Wales and Northern Ireland. Its full name is the United Kingdom of Great Britain and Northern Ireland (the UK).

The UK is in Europe. The population of the UK is approximately (примерно) 60,5 million. There are four main nationalities: English, Scots, Welsh and Irish. The capital of the UK and England is London; the capital of Scotland is Edinburgh; the capital of Wales is Cardiff and the capital of Northern Ireland is Belfast.

To the north and east of the UK is the North Sea. To the west and south is the Atlantic Ocean. The most famous river is the Thames in London, but it is not the longest. The river Severn is 354 kilometres long. The two highest mountains are Ben Nevis in Scotland and Snowdon in Wales. The largest lakes are Lough Neagh in Northern Ireland and Loch Ness in Scotland. Two more lakes, Lake Windermere and Ullswater, are popular for sailing and water skiing.

B1. Great Britain includes England, Scotland, Wales and Northern Ireland.

B2. The United Kingdom is washed by the Atlantic Ocean.

B3. The Thames is the longest river in the UK.

B4. The two largest lakes are Lough Neagh in Northern Ireland and Loch Ness in Scotland.

B5. Cardiff is the main city of Scotland.

B6. Lake Windermere is popular for diving.


B. 1 a) True b) False

B. 2 a) True b) False

B. 3 a) True b) False

B. 4 a) True b) False

B. 5 a) True b) False

B. 6 a) True b) False