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uysha [10]
2 years ago
9

SOMEONE PLEASE HELP HURRY

Chemistry
1 answer:
melomori [17]2 years ago
4 0

I think the answer is A. I know it's Planet X.

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A neutral group of atoms joined together by covalent bonds
katrin [286]
A MOLECULE
A molecule is a true representative of a covalent bond.
7 0
3 years ago
If a substance is not able to be separated by physical means but is able to be separated by chemical means, it is a(n)
fenix001 [56]
A compound is a substance that consists of 2 or more elements chemically combined in a fixed proportion.

Compounds can be broken down ijt0 simple substances by chemical means but, elements cannot.
4 0
3 years ago
which statement best describes a mole? it is 12 units of a given substance. it contains 6.02 1023 grams of sodium chloride. it i
Digiron [165]

Answer:

The correct option is;

It contains 6.02 × 10²³ particles of a given substance

Explanation:

A mole of substance is the standard scientific unit of measurement for the quantity of the substance which is made up of a large number of small particles such as molecules, ions, atoms, electrons or other entities.

The General Conference on Weights and Measures defines the mole as the amount of a substance that contains 6.02214076 × 10²³ units of entities

The number 6.02214076 × 10²³, is also known as Avogadro's number.

4 0
3 years ago
Read 2 more answers
Scenes A and B depict changes in matter at the atomic scale:
kaheart [24]

Scene B depicts chemical change in matter at atomic change.

Composition distinguishes a chemical reaction from a physical reaction. In a chemical process, the makeup of the components changes; in a physical change, the appearance, smell, or straightforward exhibition of a sample of matter changes without changing its composition. Despite the fact that we refer to them as physical "reactions," nothing is actually changing. A change in the substance in question's elemental composition is necessary for a reaction to occur. Therefore, from now on, we will simply refer to bodily "reactions" as physical changes.

Learn more about Chemical changes here-

brainly.com/question/23693316

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5 0
1 year ago
Which has more atoms, 12.0 mol of C or 12.0 mol of Ca?​
mr_godi [17]

Answer:

they are equal.

Explanation:

1 mol = 6.022 × 10^23 (Avogadro's constant), which is the number of atoms in 1 mol of any element. Doesn't matter what their atomic mass is, although, of course, 1 mol of carbon weighs less than 1 mol of calcium, but its because their mass is different, but the point is, in 1 mol of any element there is 6.03*10^23 atoms

This is like saying, what weighs more, 10 kg of feathers or 10 kg of metal

6 0
2 years ago
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