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Biblioteka

Lesson 8.3

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Posljednje ažuriranje 6 months ago
3 questions
Obavezno
1
Pitanje 1
1.
Drugi mogući odgovor:

3.75 g Ca(OH)2 1

6 moles H2O 3 moles Ca(OH)2

18.02 g H2O 1 mole H2O

1 mole Ca(OH)2 74.19 g Ca(OH)2

Obavezno
1
Obavezno
1
Pitanje 2
2.

How many grams of water are produced by 3.75 g of calcium hydroxide?

3Ca(OH)2 + 2H3PO4 --> Ca3(PO4)2 + 6H2O

Pitanje 3
3.

Correctly fill in the stoichiometric problem to answer the following question.

How many grams of oxygen are needed to produce 5.2 g of chromium (II) oxide.

4 Cr + 3 O2 --> 2 Cr2O3

Drugi mogući odgovor:

32 g O2

3 mol O2

2 mol Cr2O3

151.98 g Cr2O3

5.2 g Cr2O3

1 mol O2

1

1 mol Cr2O3