Кислород
Flashcard
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
Салтанат Рахмангулова
Used 1+ times
FREE Resource
Student preview
7 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Химический элемент "Кислород обозначается"?
Back
О2
2.
FLASHCARD QUESTION
Front
Его относительная атомная масса?
Back
16
3.
FLASHCARD QUESTION
Front
Его валентность?
Back
2
4.
FLASHCARD QUESTION
Front
Он составляет...% от массы земной коры
Back
47,2
5.
FLASHCARD QUESTION
Front
В организме человека содержится до...% кислорода
Back
65
6.
FLASHCARD QUESTION
Front
Вещества, которые ускоряют химические реакции, но сами при этом не расходуются называют?
Back
катализаторы
7.
FLASHCARD QUESTION
Front
Формула воды?
Back
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