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Vikki [24]
4 years ago
10

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydr

ogen atoms. Carbon and hydrogen chemically combine to form methane (CH4). Based on this information: A. carbon and hydrogen are elements and methane is a compound. B. carbon, hydrogen, and methane are all compounds. C. methane is an element and carbon and hydrogen are compounds. D. carbon, hydrogen, and methane are all elements
Chemistry
1 answer:
Simora [160]4 years ago
4 0

Answer:

The answer to your question is: letter A

Explanation:

We can find carbon and hydrogen in the periodic table of the elements then, they are elements. Elements are composed by only one kind of atoms.

We can not find methane in the periodic table so, Methane is a compound. Compounds are composed by 2 or more atoms of the same element or of different elements.

Letter B is incorrect because carbon and hydrogen are elements.

Letter C is incorrect because Methane is a compound and carbon and hydrogen are elements.

Letter D is incorrect because Methane is a compound.

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Answer:

1. Polar

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Based on this, the answers to the asked questions are in BOLD.

1. A POLAR bond is one where there are more shared electrons grouped around one atom than the other.

2. A NON-POLAR bond is one where the electrons are evenly distributed between the two atoms sharing electrons.

3. A molecule with symmetry is NON-POLAR

4. A molecule that does not have symmetry is POLAR.

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Explanation:

It is known that in 1 mole there are 6.023 \times 10^{23} atoms or molecules.

It is given that there are 7.2 \times 10^{23} carbon molecules. Therefore, calculate the moles as follows.

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Thus, we can conclude that there are 1.196 mol in 7.2 \times 10^{23} carbon molecules.

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