Quick chem question!

I will mark as BRAINLIEST!!!

Answer:

kinetic energy

Particles in solids are always vibrating (moving back and forth) in place. The vibrational motion of particles in solids is kinetic energy. Heat makes the particles in a solid vibrate faster, giving them more kinetic energy.

Explanation:

The kinetic molecular theory of the states of particles describes the behavior, shape, motion, and observable properties. The particles of solids vibrate in a fixed position. Thus, option D is correct.

The kinetic-molecular theory was given for the states of matter and to show the movement and composition of the particles of the solids, gases, and liquids. It shows their motion respective to the phases and effects of various factors.

In kinetic-molecular theory, the solid particles are explained based on behavior and motion. It states that the solids have the least amount of kinetic energy in them due to their dense packaging. The solids are fixed in a place and show the back-and-forth vibration that is possible due to the least distance.

Therefore, option. the solid particles only vibrate at a fixed location.

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Your question is incomplete, but most probably your full question was, According to the kinetic-molecular theory, gas particles, liquid particles, and particles of a solid all experience some type of motion. Which statement best describes the motion of particles of a solid?

A. They are motionless and in fixed positions.

B. They move slower and are farther apart than the particles of a liquid.

C. They are in greater disorder than the particles of a liquid.

D. They vibrate about fixed points.

Answer:

12 grams

Explanation:

For any radioactive substance

the amount of substance left after n half life  is given by = [tex]x/2^n[/tex]

where x the original amount of substance.

____________________________________________

Half life of isotope Np-238 = 2 days

total no of days = 6

no of half life =total no of days/Half life of isotope Np-238 = 6/2 = 3

thus,

for our problem n = 3

initial amount of Np-238 = 96 grams

thus,

the amount of substance left after 3 half life = 96/2^3 = 96/8 = 12 grams.

Thus, 12 grams will be left after six days.

Answer:

for the second one i'd go with reflection

Explanation:

Answer:

Explanation:

Definition of Prokaryote. a single-celled organism (such as bacteria) that lacks a nucleus and cannot be seen with the naked eye. Examples of Prokaryote in a sentence. 1. The scientist studied the prokaryote under the microscope to see if its single-cell would multiply in certain conditions.

Hope this helps!

Prokaryotes are a single celled organism that is microscopic. They do not have a distinct nucleus with a membrane. They don't have other specialized organelles either. They also include bacteria and archaea.

"Prokaryotes are so small you cant see them with the bare human eye!"

[tex]\boxed{I\;hope\;it\;helps!}[/tex]

<3

They're made up of three main parts: protons, neutrons and electrons. Think of the protons and neutrons as together forming a “sun”, or nucleus, at the centre of the system. The electrons orbit this nucleus, like planets. If atoms are impossibly small, these subatomic particles are even more so.

Answer:

denaturing

Explanation:

enzyme denatures in extreme temperature and pH

Answer:

Denaturation

Explanation:

It change the shape of enzyme . It also occur in only high temperatures

Answer:

False. Chemical changes are always physical changes

Answer:

False

Explanation:

Explanation:

they are located in the neucleus

Answer: they are located in the neucleus

Explanation:

Answer:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

How are physical and chemical changes similar and different? (compare and contrast) (Physical and chemical changes are similar because matter experiences a change in state, Physical changes are different because matter remains the same substance, just in a different state, whereas chemical changes change the matter

Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical changes.

Explanation:

Answer:

temperature

Explanation:

Answer:

d

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 1.8 kg

volume = 0.2 L

We have

[tex]density = \frac{1.8}{0.2} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

knkjhhg

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

We have

[tex]density = \frac{10}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} \\ [/tex]

So we have

[tex]volume = \frac{220}{11} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

Answer:

sea water

Explanation:

Answer:

Li2S> Na2S> K2S> CsS

Explanation:

The lattice energy of ionic species depends on the relative sizes of ions in the ionic compounds. As the size of ions increases, the lattice energy decreases and vice versa.

When the size of the anions are the same, the lattice energy now depends on the relative sizes of the cations. Therefore, since all the compounds are sulphides and the order of magnitude of ionic sizes is: Li^+ < Na^+ < K^+ < Cs^+.

Therefore, the order of decrease in lattice energy is; Li2S> Na2S> K2S> CsS

Answer:

balanced;

unbalanced;

unbalanced;

balanced;

Explanation:

CaO + 3C → CaC2 + CO  //all elements are balanced

Na + H2O → 2NaOH + H2  //Na is not balanced on the left

4Fe + O2 → 2Fe2O3  //O is not balanced on the left

2Mg + O2 → 2MgO //left is equal to right, balanced

Answer:

Physical changes involve states of matter and energy.

Explanation:

No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.

The characteristics that can be changed in the physical change has been shape or size of the compound.

Change in the element has been classified as chemical and physical change. The chemical change has been given as the change in the chemical composition of the elements.

The physical change has been the change in the state and form of the element, that has been reversible.

The characteristics that can be changed in the physical change has been shape or size of the compound.

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Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Answer:

C. The mass of an electron is much less than the mass of a proton or

a neutron.

Explanation:

When we compare the mass of an electron to that of proton or neutron, the mass of an electron is much less than the mass of a proton or a neutron.

Electrons are negatively charged particles in an atom

Protons are positively charged particles

Neutrons do not carry any charges.

We can see that electrons have very small mass and this is why when calculating the mass of an atom, we use the sum of the number of protons and neutrons.

Answer:

e.  89

Explanation:

The mass number is the number of protons and neutrons in an atom.  It doesn't include electrons.

43 + 46 = 89

Answer:

Gravity

Explanation:

According to Newton's Law of Gravity, an object with mass will attract another object with mass.

Answer:

If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid.

The distance between the particles increases tremendously the attraction doesn't change.

Whilst water is boiled, the heat energy is transferred to the molecules of water, which begin to pass extra quickly. ultimately, the molecules have an excessive amount of power to stay connected as a liquid. while this takes place, they shape gaseous molecules of water vapor, which go with the flow to the floor as bubbles and tour into the air.

On heating, their kinetic electricity pushes neighboring atoms or molecules other than each different. This pushing of atoms or molecules outcomes in a slightly accelerated distance among molecules and the volume of stable additionally increases.

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I think its B cause...

When an atom loses an electron, it becomes a cation (positive ion). When an atom gains an electron, it becomes an anion. Ions are created when an atom loses or gains an electron. Atoms can never lose or gain protons, as this would change the fundamental identity of the atom.

if I'm wrong...please don't attack me

The cations are formed when an atom loses electrons.  

• The positive ions produced by the loss of one or more electrons are known as the cations.  

• The most commonly formed cations take place in the case of the elements, which involve the loss of all the valence electrons.  

• The resulting cation exhibits the electronic configuration of the noble gas atom.  

• The negative ions produced from the gain of one or more electrons are known as the anions.  

Thus, the correct answer is option b, that is, the cations form when an atom loses electrons.

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Answer:

C = 2

D = 6

E = 1

Explanation:

just took the test :)