Предмет: Химия, автор: zosenkonastya

1)В воде массой 21г растворили 4г нитрата калия . Определите массовую долю % соли в растворе

2) вычислите массовую долю (%) хлороводорода в растворе кислоты, содержащем 14,6г HCI и 385,4г воды

3) при ожогах электр током накладывают повязку , смоченную 1%-ным раствором перманганата калия . Вычислите массы воды и соли , необходимых для приготовление 200г такого раствора .

Ответы

Автор ответа: dubes
0
1) w(KNO3)=4/25=0,16 или 16%
2)w(HCl)=14,6/400=0,0365 или 3,65 %
3)m(KMnO4)=200*0,01=2 г
m(H2O)=200-2=198 г
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6) bicycle F. crossing
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II. Complete the sentences with these words: sail, drive, ride, fly, cross.
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4. Don’t … the street here!
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III. Fill in: in, on, by, of.
1. It’s … your left.
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3. The girl leans out … the window.
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Put the words in the correct order to form full sentences.
1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
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5. pavement, the, stand, on.
Put the words in the correct order to form full sentences.
1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.
Put the words in the correct order to form full sentences.
1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.
Put the words in the correct order to form full sentences.
1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.
Put the words in the correct order to form full sentences.
1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.
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1. run, don’t, the, onto, road.
2. lanes, bike, use.
3. both, ways, traffic, for, look.
4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.
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2. lanes, bike, use.
3. both, ways, traffic, for, look.
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4. don’t, of, window, out, the, lean.
5. pavement, the, stand, on.

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Thank you.
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