8. MASĖS DALIS JUNGINYJE (2024)
Quiz
•
Chemistry
•
1st - 10th Grade
•
Hard
Vygandas Marozas
Used 8+ times
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11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kokios yra kalio ir bromo masės dalys kalio bromide (KBr)?
K 23%, Br 77%
K 67%, Br 33%
K 33%, Br 67%
K 13%, Br 87%
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kokios masės dalys kalcio ir deguonies yra kalcio okside (CaO)?
Ca 71%,O 29%
Ca 31%,O 69%
Ca 29%,O 71%
Ca 21%,O 79%
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kokia masės dalis bromo yra vandenilio bromide HBr ir natrio bromide NaBr?
NaBr bromo masės dalis 99%, o HBr - 78%
HBr bromo masės dalis 65%, o NaBr - 98%
HBr bromo masės dalis 89%, o NaBr - 87%
HBr bromo masės dalis 99%, o NaBr - 78%
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kuriame junginyje deguonies masės dalis yra mažesnė: sieros diokside (SO2) ar azoto diokside (NO2)?
SO2
NO2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kuriame junginyje sieros masės dalis yra didžiausia: vandenilio sulfide (H2S), sieros triokside (SO3), ar sieros rūgštyje (H2SO4)?
H2S
H2SO4
SO3
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Apskaičiuokite: kalcio, sieros ir deguonies masės dalis kalcio sulfate CaSO4.
Ca 47%, O 24%, S 29%
Ca 24%, O 47%, S 29%
Ca 29%, O 47%, S 24%
Ca 47%, O 29%, S 24%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kokia yra deguonies masės dalis kalio hidrokside (KOH).
28,57%
50%
40,1%
32,5%
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