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Verizon [17]
3 years ago
13

Plz help thx...

Chemistry
2 answers:
Damm [24]3 years ago
7 0

1) For example, sodium oxide (Na₂O).

One one molecule of sodium oxide has one sodium atome (Na) and two oxygen atoms (O).

The subscript after element shows the number of elements in a molecule.

2) Yes, it possible for two different compounds to be made from the exact same two elements.

This are isomers, same molecular formula, but different arrangements of atoms.

For example, n-butane (C₄H₁₀) and 2-methylpropane (C₄H₁₀).

3) There are large number of compounds in this world, around 40 millions.

ArbitrLikvidat [17]3 years ago
4 0

Answer:

salt

Explanation:

sodium chloride. 1 sodium atom and one hydrogen atom.

It is possible because there could be more atoms, making it more or less reactant.

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The region that does not match its description is the fourth answer choice which is Abdominal region: spine

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The cranial region encompasses the upper part of the head.

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The axillary region is an anatomical region under the shoulder joint where the arm connects to the shoulder. Therefore, it encompasses the armpits.

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The thoracic region runs from the base of the neck down to the abdomen. Therefore, it encompasses the chest

∴ The third answer choice matches its description

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∴ The fourth answer choice does NOT match its description.

Hence, the region that does not match its description is the fourth answer choice which is Abdominal region: spine

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