CHEMISTRY HIGH SCHOOL

A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a(n) .

Answers

Answer 1
Answer: I believe the correct answer is a mixture. Most rocks are just different compounds or elements somewhat fused through heat and pressure. The substances are not chemically bonded together which means that they all retain their chemical identity and therefore can be separated by breaking them up. A good example of this is granite where you can see the different compounds that got fused together and can falls apart when you grind it. I hope this helps. Let me know if anything is unclear.
Answer 2
Answer:

Answer:

mixture

Explanation:

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Covalent compound for c4i7

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the covalent compound of c4i7 is 6

Over 100 existing elements are listed and classified on the ____________________.

Answers

Final answer:

The Periodic Table of Elements lists over 100 known elements, providing critical information such as the element's atomic number, symbol, name, and atomic mass. Elements are grouped based on their chemical properties and electron configuration.

Explanation:

Over 100 existing elements are systematically organized and displayed on the Periodic Table of Elements. Each box on the Periodic Table represents a different element and provides critical information such as the element's atomic number, symbol, name, and atomic mass. Elements are grouped together based on their chemical properties and electron configuration, which is a representation of the organization of electrons around the nucleus.

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Final answer:

Over a hundred elements, both naturally occurring and experimentally discovered, are listed and classified on the Periodic Table of the Elements. They are sorted by atomic number, and those with similar properties and valence shells are grouped into columns and rows respectively.

Explanation:

Over 100 existing elements are listed and classified on the Periodic Table of the Elements. This list of elements is arranged in ascending order of atomic number, which is the number of protons in each nucleus. The periodic table not only identifies the chemical symbol, atomic number, and mass number of each element but also groups elements according to their propensity to react with other elements.

It's important to note that elements found on the periodic table have an equal number of protons and electrons. However, the number of protons and neutrons may not always be equal across all elements. In addition to the 92 naturally occurring elements, there are several larger, unstable elements that have been discovered experimentally

Aside from organizing elements according to their atomic number, the periodic table is also structured in a way that elements with similar properties compose columns in the table, while elements with the same number of valence shells compose rows, making it an essential tool for understanding and predicting chemical behaviors.

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Look at this picture of a whale shark.Which question about whale sharks is nonscientific?

A) What do whale sharks eat?

B) How big is the average whale shark’s mouth?

C) Does a whale shark like having a large mouth?

D)What happens to the water that enters a whale shark’s mouth?


Chemistry Honors College level

10th grader

Answers

Answer:

The nonscientific question about whale sharks is

C) Does a whale shark like having a large mouth?

This question asks for the subjective preference of a whale shark, which cannot be determined scientifically since we cannot directly communicate with the animal. Scientific questions are typically based on observable facts and measurable data.

Explanation:

Have a good day <3

An acid-base indicator is used in what type of reaction?

Answers

Acid - base indicators (also known as pH indicators) are substances which change color with pH. They are usually weak acids or bases. you use them if you want to know if a solution is an acid or it it's a base

In the formula X2O5, the symbol X could represent an element in Group(1) 1 (3) 15
(2) 2 (4) 18

Answers

Answer: (3) 15

Explanation: We criss-cross down the oxidation numbers to get the subscripts for the correct formulas. That means the X has an oxidation number of 5. The element with the + oxidation number is always written first so it is +5. Of the groups names, only group 15 has +5 as an oxidation number.

Which component in this mixture has the lowest density? A. glass. . B. water. . C. sawdust. . D. sand

Answers

I believe the correct answer from the choices listed above is option A. The component in the mixture that would have the lowest density would be glass. It would be the material that floats who has the lowest density. Hope this answers the question. Have a nice day.

Answer:

I took the test. The answer is C. Sawdust.

Explanation:
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