Предмет: Химия, автор: galicmikola7

Обчисліть відносну густину NH3 за киснем і повітрям

Ответы

Автор ответа: yaroslavpolischuk11

Відповідь:

D=M(NH3)÷M(O2)

Пояснення:

D за киснем:

M(NH3)=14+1×3=17 г/ моль

М(O2)=16×2=32 г/моль

D=17÷32=0,53

D за повітрям:

М повітря завжди = 29

D=17÷29=0,58

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Dear Diary,

1. _____________This morning my exam results finally had came.
I'd been

expecting

2. _ ___ them for the last week. I knew I'd been done quite

well, but I was

3. ___ still nervous as I had opened the envelope.
Before I'd had a chance to 4. _ _ look
at them, my sister ran up and pulled them out of my

hand! She

5 _ _ had геаd them out one
by one. "English A, maths A, biology A,

6. _________ French A ..." This was the news I'd been waiting for. I'd got As in

7. __ _ every subject - even geography, which I hadn't been making sure

8. ____ _ about! When Mum and Dad heard the news, they immediately started
9._________________ been shouting with joy. By the time I'd had

breakfast, Mum had

10.
_ _ __ already called Grandma and Grandpa and had yet

told the neighbours!Dear Diary,

1. _____________This morning my exam results finally had came.
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well, but I was

3. ___ still nervous as I had opened the envelope.
Before I'd had a chance to 4. _ _ look
at them, my sister ran up and pulled them out of my

hand! She

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by one. "English A, maths A, biology A,

6. _________ French A ..." This was the news I'd been waiting for. I'd got As in

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