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3 years ago

Identify the primary form of energy in each image

Chemistry

2 answers:

stepladder [879]3 years ago

7 0

Answer:

Candle: Radiant Energy // Lake: Motion Energy // Log: Chemical PE

Explanation:

The candle emits light (radiant), the lake water is moving I assume (motion), and the log has the ability to be burned (chemical potential). I know this question is three years old but hope this helps someone lol

-Dominant- [34]3 years ago

3 0

Without images this is an impossible question.

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Which noble gas does not have a true octet

Nadusha1986 [10]

Answer:

Hellium

Explanation:

Data Given:

Krypton

Helium

Xenon

Neon

doesn't have true Octet =?

Solution:

Octet Rule:

The atoms have 8 electrons in their valence shell and have stable electronic configuration.

Now we will look for the electronic configuration of each given noble gas to look for octet rule

1. Krypton (Kr)

Atomic No. 36

Electrons per shell: 2, 8, 18, 8

Electronic configuration: [Ar] 3d¹⁰, 4s², 4p⁶

it have 8 electrons in its outer (valance) shell and obey octet rule

___________________

2. Hellium (He)

Atomic No. 2

Electrons per shell: 2

Electronic configuration: 1s²

It have 2 electrons in its outer (valance) shell and do not obey octet rule. although it is stable and obey duplet rule but not have true octet.

_____________________

3. Xenon (Xe)

Atomic No. 54

Electrons per shell: 2, 8, 18, 18, 8

Electronic configuration: [Kr] 4d¹⁰, 5s², 5p⁶

it have 8 electrons in its outer (valance) shell and obey octet rule

___________________

4. Neon (Ne)

Atomic No. 10

Electrons per shell: 2, 8

Electronic configuration: 1s², 2s², 2p⁶

it have 8 electrons in its outer (valance) shell and obey octet rule

___________________

So its only the hellium that do not have octet.

4 0

3 years ago

Which solution is a homogeneous mixture?

avanturin [10]

salt and water solution is a homogeneous mixture

Explanation:

Homogeneous mixtures generally termed as solutions, have an identical similar occurrence and form throughout (the prefix "homo" means the same). Solutions consist of particles as tiny as fragments or molecules. For instance, a sugar solution is homogeneous because only transparent liquids can be seen. Homogeneous mixtures only have individual phase: gas, liquid or solid.

Solvent: normally the material in the greater amount. The material used to dissolve the solute or solutes. Example: water.

Solute: ordinarily the substance in the lesser amount. The substance dissolved by the solvent. Example: salt

Salt and water solution is homogeneous because only transparent liquids can be seen.

3 0

3 years ago

Ionic compounds generally have lower boiling and melting points than covalent compounds.

Anuta_ua [19.1K]

Answer:

The given statement is false.

Explanation:

Ionic bond is formed by strong electrostatic attraction between two atoms having large difference in their electronegativity.This strong electrostatic attraction provide structural stability to the ionic compounds.For example NaCl.

The ionic compounds generally are solid in nature.As a result their melting point and boiling point are higher that covalent compounds as covalent compounds exist in liquid of gaseous state.

3 0

3 years ago

Consumers get an idea of the building blocks of foods from ________________ and ________________.

oee [108]

Answer:

Ingredient lists and nutritional facts

Explanation:

The packaged food, a consumer purchases has all its details written on the food package which is also verified by a trusted government institution.

Ingredient List

The list tells each ingredient in food product by the food's common or usual name in the descending order by the weight.

Nutrition Facts Label

FDA requires this label on most of the packaged foods and the beverages. At top of Nutrition Facts label, there is written total number of the servings in container and serving size of food or drink. Serving size on label is based on amount of the food which people eat typically at one time. Rest of nutrition information on label is based usually on one serving of food or beverage.

7 0

3 years ago

Student follow up

sleet_krkn [62]

Answer:

Magnesium and calcium belong to the second group i. e. alkaline earth metals. They are known as earth metals because they are extracted from the earth. They are very reactive elements. Their reactivity increases when we go from top to bottom because the outermost electrons goes farther from the nucleus i. e. atomic radius increases so less energy is needed for its removal.

8 0

3 years ago