Предмет: Химия, автор: lenovo0677184380

Определите, какие свойства – физические или химические физические или химические – описаны в следующих выражениях:

a) Золото – довольно мягкий металл желтого цвета, пластичный, тяжелый, имеет высокую электропроводность и температуру плавления;

б) Благодаря высокой устойчивости к различным внешним факторам и низкой реакционной способности (например, не окисляется в сухом или влажном воздухе) золото издавна использовали для изготовления монет и украшений.

Ответ аргументируйте.

Ответы

Автор ответа: infinitybrains

Ответ:

а)физическое св.

б)хим.св.

Объяснение:

первое физическое свойство так как там говорится про массу,твердость,агрегат.состояние и т.п.

второе хим.так как там говорится про реакции и изменения золота

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Read the text "My class and classmates".

does_class_size_really_matter.jpg

I am a pupil of the 7th form. I study at a secondary school. My school is one of the oldest schools specializing in teaching English in our town. It is situated in the centre of our town in Shevchenko street. I go to school five days a week. It usually takes me 15 minutes to get there. Our classes begin at 8 o'clock in the morning and last till 3 o'clock in the afternoon. We usually have six or seven lessons a day. Our classroom is large and light.

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Write 3 words into each gap:

1. You'll also see different pictures, diagrams, wall newspapers and portraits of ______

there.

2. I am on _____

all my classmates.

3. Everybody tries to be ____

and always does his best to help other pupils when they have some problems.

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