Chemistry, 29.07.2021 21:00 19wawrzkeek
Neon có 2 đồng vị 20 Ne(91%) Và 22Ne 10 10 (9%) Tính nguyên tử khối trung bình của Neon
Answers: 1
Chemistry, 22.06.2019 10:30
Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?
Answers: 3
Chemistry, 22.06.2019 17:30
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
Answers: 2
Neon có 2 đồng vị 20 Ne(91%) Và 22Ne 10 10 (9%) Tính nguyên tử khối trung bình của Neon...
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