Which of the following is amphoteric?
H20
H30-
H+
O2-...
Answers: 2
Chemistry, 20.06.2019 18:04
In which chemical equation, which symbol should be used to indicate that substance is in solution?
Answers: 1
Chemistry, 22.06.2019 08:30
Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?
Answers: 1
Chemistry, 22.06.2019 13:30
Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?
Answers: 3
Chemistry, 23.06.2019 00:30
The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils
Answers: 2
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