Help with this question!!!

Answer:

matter , equals , weight , size

Answer:

cracks in the road, hot air balloons, tire bursts

Explanation:

cracks in the road: the road expand on heating

hot air balloons: Because the hot air inside the balloon bag increases in size faster than the container it stretches the bag so that it expands and displaces the colder (heavier) air outside the bag

tire bursts in hot days when filled full of air due to thermal expansion

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Answer:

radiation

Explanation:

Answer:

neither

Explanation:

Kinetic Energy is the physical movement of objects.

Answer:

Explanation:

Example of compound(CO)

Example of mixture(Milk)

Answer:

Hiii

Explanation:

Your answer is Atmosphere

The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and warming the surface through heat retention (the greenhouse effect). The atmosphere is further classified into multiple layers by temperature, which include the thermosphere, the mesosphere, the stratosphere, and the troposphere.

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Answer:

75.6

Explanation:

756x0.1=75.6

1 d =hm=0.1

Answer:

The density of the object is 0.32gcm3.

Explanation:

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Answer:

B

Explanation:

All cations have more protons than electrons so they always have a positive charge.

Answer:

24

Explanation:

Answer:

False

Explanation:

This is because potential energy is energy that it not used yet.

Answer:

For homogeneous:

Filteration, vaporization, and a reverse chemical reaction

Explanation:

1) precipitation/crystallization reactions - if one of the components can form a solid salt when the solution undergoes several factors (concentration change, temperature change, etc); separation can be done either by filtration, centrifugation, or simple decantation.

(2) chromatography - separation can be based on the mobility of the phases (liquid chromatography, gas chromatography, ion-exchange, etc.)

(3) solvent extraction - if the components are both liquid, separation based on their relative solubilities

(4) distillation - separation based on different boiling points.

(5) magnetic separation - if one of the components have magnetic properties.

(6) electrophoresis - separation of organic molecules based on the type of gel used

heterogeneous:

Main methods of separation of heterogeneous mixtures

- Magnetic separation

- Sublimation

- Decantation

Liquid-solid mixture

Liquid-liquid mixture

- Filtration

- Centrifugation

Themes of interest

Answer:

Explanation:

D is the answer

Each kind of atom has a characteristic difference in energy levels for electrons, this property accounts for the fact that atoms can be identified by an examination, therefore the correct answer is option D.

It is the process of emission of electrons from the material because of absorption of electromagnetic radiation in form of photons of light waves.

The photoelectric effect explains the particle behavior of the light waves.

Each kind of atom has a characteristic difference in energy levels for electrons this fact can be used to identify the different atoms by using inspection.

Thus, the correct answer is option D.

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Answer:

The shape of a covalent molecule can be predicted using the Valence Shell Electron Pair Repulsion (VSEPR) theory. Very simply, VSEPR theory says that the valence electron pairs in a molecule will arrange themselves around the central atom (s) of the molecule so that the repulsion between their negative charges is as small as possible.

Explanation:

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Electron-pair repulsion play an important role in determining the molecular shape using VSEPR theory.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

The shape of a covalent molecule can be predicted using the Valence Shell Electron Pair Repulsion (VSEPR) theory.  VSEPR theory says that the valence electron pairs in a molecule will arrange themselves around the central atom (s) of the molecule so that the repulsion between their negative charges is as small as possible.

Therefore, electron-pair repulsion play an important role in determining the molecular shape using VSEPR theory.

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Answer:

Zn

Explanation:

H2SO4 + Zn → ZnSO4 + H2

Zn is the answer.

Answer:

H2SO4+Zn =ZnSO4 +H2

this is the answer

Answer:

calcium carbonate deteriorates, delivering carbon dioxide gas and leaving behind calcium oxide a white solid. Over the long haul, this responds with carbon dioxide noticeable all around to frame gems of calcium carbonate, which lock the sand grains together to shape a hard rock-like material

Explanation:

Answer:

calium bicarbonate

Explanation:

Answer:

Alcohol in Your Body

Alcohol reaches your brain in only five minutes, and starts to affect you within 10 minutes. After 20 minutes, your liver starts processing alcohol. On average, the liver can metabolize 1 ounce of alcohol every hour.

Explanation:

hope that helps you i just love sharing glmv sorry

Answer:

8

Explanation:

It increases going up, because atom size is smaller, with greater energy levels; going right to left decreases, because they will have smaller charges when going through right to left.

Then, Calcium (Ca) is non-metal that reacts with Nitrogen (N), a non-metal. When 2 non-metal elements become a compound, it's covalent. Therefore, the bond between both of the elements are covalent.

Answer:

what do you need help with?

Explanation:

Answer:

Hello brainly user! You did not provide a question for us to help you with! In order for someone to help you, you need to provide the question you are in need of help for. What's your question?

[tex] - 34 {}^{15} [/tex]

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{6.20 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 10.299003[/tex]

We have the final answer as

Hope this helps you

The incorrect grouping of elements is Argon, potassium, slicon, strontium.

Periodic table is a systematic arrangement of chemical elements within the coloums and rowns on the basis of their properties.

In all options given elements belongs from the same group except the first one, beacuse in argon, potassium, silicon & strontium all are present in different groups of periodic table. As argon is present in the 18th group, potassium is present in the 1st group, silicon is present in the 14th group and strontium is present in the 2nd group of the periodic table.

Hence, correct option is (A).

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Answer: different ions of an element, the answer is A

Explanation: Took the quiz

Answer:

different ions of an element, the answer is A

Explanation:

edge 2022

Answer:

valancy

Explanation:

Answer:

it will have a net negative charge and it is known as anion

Answer: hope this helps mark me BRAINLEST plz ;)

Explanation:42. Practice Problem  How many joules of energy are required to vaporize 423g of water at 100oC and 1atmosphere of pressure. q = mHv m = 423 g Hv = 2260 J/gq = (423g) (2260J/g) = 955,980 J = 956 43. Table T – Heat Formulas

The amount of heat needed to melt 423 g of water at 0°C is 141282 J

The heat required to melt water can be obtained by using the following formula:

Q is the heat required.

L is the latent heat of fusion (334 J/g)

m is the mass.

With the above formula, we can obtain the heat required to melt the water as illustrated below:

Mass of water (m) = 423 g

Latent heat of fusion (L) = 334 J/g

Q = mL

Q = 423 × 334

Therefore, the amount of heat needed to melt 423 g of water at 0°C is 141282 J

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