CHEMISTRY HIGH SCHOOL

When the compound, Ba(C2H3O2)2, is mixed with water, the Ba(C2H3O2)2 is:soluble because compounds containing the C2H3O2− ion are soluble in water

insoluble because most compounds containing the C2H3O2− ion are insoluble in water

soluble because all Ba+2 compounds are soluble in water

insoluble because no Ba+2 are soluble in water

Answers

Answer 1
Answer:

Answer:

the answer is soluble because compounds containing the C2H3O2− ion are soluble in water
Answer 2
Answer: When the compound, Ba(C2H3O2)2, is mixed with water, the Ba(C2H3O2)2 is insoluble because most compounds containing the C2H3O2− ion are insoluble in water

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An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result?The first atom emits light with more energy.
The second atom emits light with more energy.
The first and second atoms absorb energy without emitting light.
The first and second atoms emit light with the same amount of energy.

Answers

The correct option is this: THE FIRST ATOM EMITS LIGHT WITH MORE ENERGY.

In the question given above, the level 1 mentioned in the question refers to the ground state of the electrons while level 2 and level 3 refer to excited states of hydrogen electrons. When an atom is in an excited state, it possess more energy and it is unstable, thus, it tends to return to the ground state after sometime to attain stability. As the atom return to the ground state, it loses its energy by emitting light. The higher the level of excitation, the more the light that will be emitted when the atom is returning to the ground state. Thus, an atom returning to the ground state from level 3 has more energy and will emit more light when returning to the ground state than an electron in level 2.
The first atom emits light with more energy.

This malleable metal has an atomic number of 79

Answers

The malleable metal on the periodic table with the atomic number of 79 is gold

Does Silicon form a cation or is it anion?

Answers

Silicon generally forms at least polar covalent bonds, like carbon, as befits its status as a Gropu 4A nonmetal. The only obvious exception I can think of is SiC, which despite the similarity you might expect to graphite or diamond does, I think, have significant ionic or metallic character to its bonding in the solid state.

Knowledge of atomic structure has evolved over time. Thomson discovered that atoms contain electrons, Rutherford discovered that most of the mass of an atom is concentrated in its center, and Bohr discovered that electrons orbit the nucleus. Taken together, what do these discoveries demonstrate?
A. the cumulative nature of science
B. the quantitative nature of science
C.the importance of thorough review of scientific papers
D. the importance of not publishing science until it is final

Answers

I believe the correct response would be A. The cumulative nature of science. How experimental evidence and ideas made by many scientists have accumulated and or built up to have a more understandable and or clear view of a particular scientific topic, and or principle.

What do scientists usually do if they can't draw clear conclusions?

Answers

collect more data to support their hypothesis
They use the Scientific Method.
The Scientific Method is made up of steps scientists take to draw a conclusion
Step 1: Form a Question
Step 2: Research the Question
Step 3: Form a Hypothesis (educated guess)
Step 4: Conduct an Experiment (use quantitative and qualitative data)
Step 5: Form Your Conclusion Based on Results

This should help....


When May a hypothesis be revised

Answers

Answer:    Based on experimental data

Explanation:  The hypothesis is not the ultimate proven theory, the more a preliminary assumption on the basis of which further research is carried out with the help of experiments in order to prove the hypothesis as accurate. If the experiments carried out showed that the hypothesis is wrong, it is necessary to revise the hypothesis and set up a new experiment.

a hypothesis may be revised after the experiment that you performed proved it wrong. then after looking over the data you should revise your hypothesis and perform the experiment again.
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