A chemist is studying an unknown substance. He can break it into its elemental components only by using chemical means. Based on this observation, how should the unknown substance be classified?

Answers

Answer 1

Answer:

The answer would be:

Pure substance: specifically a compound

Pure substances can be categorized into compounds and elements. A compound is a pure substance that cannot be broken down physically, but it can be broken down through chemical means. It is this property that differentiates it from mixtures. Mixtures can be broken down by physical and/or chemical means.

Elements on the other hand, cannot be broken down at all because it is in its simplest form and is also considered as a pure substance.

Answer 2

Answer:

Answer:

Pure substance

Explanation:

Matter can be broadly classified into two categories: Pure substances and Mixtures (homogenous and heterogenous mixtures).

The simplest form of a pure substance is an element which cannot be broken down any further. When two or more elements combine, they form a compound which is also a pure substance. Thus, pure substances are systems that are either composed of a single type of element or a single type of molecule.

For example salt (NaCl) is a compound which is composed of elements: sodium (Na) and chlorine (Cl). These elements (in fact ions, Na+ and Cl-) are held together by a chemical bond. Thus, a pure substance like NaCl can be broken down into its elements through chemical means.

The unknown substance in the given question can therefore be classified as a pure substance

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Answers

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Answers

Antoine Lavoisier proved that oxygen is required for material to burn. Without oxygen, the fire goes out which is easily testable.

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Answers

Answer:

true

Explanation:

What is an example of the strong nuclear force?

Answers

Here are two examples of strong nuclear force !

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I hope that's help !

a sample of ammonia contains 9g hydrogen and 42g nitrogen. another sample contains 5g hydrogen .calculate the amount of nitrogen in the second sample

Answers

Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. Therefore, the amount of nitrogen in the second sample is 23.3g.

What is mass?

Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.

Average atomic mass = (mass of first isotope× percent abundance of first isotope)+(mass of second isotope× percent abundance of second isotope)

9 g of hydrogen - 42 g of nitrogen

5 g of hydrogen - x g of nitrogen

9x= 42 ×5

x=23.3g

Therefore, the amount of nitrogen in the second sample is 23.3g.

To learn more about mass, here:

brainly.com/question/28704035

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9 g of hydrogen - 42 g of nitrogen
5 g of hydrogen - x g of nitrogen

$9x=42 \cdot 5 \n9x=210 \nx \approx 23.33$

The mass of nitrogen in the second sample is 23.33 g.

Which of the following chemicals, found in tobacco smoke, is also found in nail polish remover?a. ammonia
b. acetone
c. formaldehyde
d. arsenic

Answers

The answer is the option B. Acetone. Acetone is a very important solvent. Due to its solvent ability, acetone is the main constituent of nail polish removers to dissolve finger nail paint.. Acetone is also present in cigarettes as solvent for extraction process. Acetone then is found the cigarette smoke.Hope this helps. Let me know if you need additional help!

Answer:

b is the correct answer for e2020

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