
OBLICZENIA STECHIOMETRYCZNE
Chemistry, Science
7th - 8th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Masa substratów jest równa masie produktów reakcji chemicznej.
Tak brzmi:
Prawo stałości składu
Prawo zachowania masy
Prawo Pitagorasa
Prawo okresowości
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Spalono 18 g węgla w 48 g tlenu. Ile CO2 powstało w tej reakcji?
C + O2 → CO2
66 g
30 g
126 g
44 g
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Do poniższej reakcji użyto 12,7 g miedzi i otrzymano 15,9 g tlenku miedzi (II). Ile użyto w tej reakcji tlenu?
2Cu + O2 → 2CuO
28,6 g
32 g
3,2 g
56 g
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
W reakcji użyto 6 g magnezu. Ile gramów siarczku magnezu w niej wyprodukowano?
Mg + S → MgS
32 g
24 g
12 g
14 g
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ile chlorku sodu powstanie w reakcji 4,6 g sodu z pewną ilością chloru?
2Na + Cl2 → 2NaCl
11,7 g
46 g
4,6 g
23,4 g
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2Fe2O3 + 3C → 4Fe + 3CO2
W reakcji powstało 66 g tlenku węgla (IV). Oblicz ile użyto w niej tlenku żelaza (III).
132 g
160 g
226 g
300 g
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oblicz ile gramów siarczku glinu powstanie w reakcji 108 g glinu z siarką.
150 g
225 g
300 g
450 g
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