What is the density of a substance with a mass of 1.8 kg and a volume of 0.2 L?

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Explanation:

Explanation:

The problem basically wants you to find a way to convert between the number of atoms present in the sample and the number of moles they are equivalent to.

To convert between atoms and moles we use something called Avogadro's constant, which basically acts as the definition of a mole.

More specifically, in order to have one mole of an element you need 6.022⋅1023 atoms of that element. You can thus use this number as a conversion factor to take you from atoms to moles or vice versa.

In your case, you will have

Answer:

D

Explanation:

Kwkekkfkekwknmxmdlwlmcfmkee

Answer:

In Australia, it's warmer than most of the United States during winter.

Explanation:

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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Answer:

Any unapposed interaction that will change the motion of an object.

Explanation:

My physics teacher had us write this down last week.

Answer:the atoms of a solid aluminium can are close together vibrating in a rigid structure if the can is warmed up on a hot plate

Explanation:

Answer:

Explanation:

Heat moves from hot sand to the bottoms of your feet by conduction. Conduction is the transfer of heat between objects that touch each other.

Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.

Heat conduction is a phenomenon that occurs through the interaction of neighbouring atoms and molecules, transferring their energy/heat (partially) to their neighbours.

This is the most significant means of heat transfer within a solid and between solid objects in thermal contact.

Conduction is the transfer of heat between objects that touch each other.

Therefore, Heat moves from hot sand to the bottoms of your feet by conduction.Hence Option (A) is correct.

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And this is y I should of paid attention in that one science class in middle school that taught this...

(￣▽￣;)

Explanation:

i think if you add them all the total is 26

Answer:

25 shirts

Explanation:

5+6=11+3=14+5=19+2=21+4=25 (if u dont understand how I wrote that then) 5+6=11, 3+5=8, 2+4=6

11+8=19, 19+6=25

The amount of energy in joules : 4.31 x 10⁴ J

Energy can be interpreted as the ability to do work

There are several examples of energy , including heat energy

The amount of heat is influenced by the mass of the object and the difference in temperature

Can be formulated

Q = m.c.ΔT

Q: heat received or removed by an object (J)

m: object mass (kg)

c: heat type substance (J / kg⁰C)

ΔT: temperature change (⁰C)

The amount of energy given off is 1.03x10⁴ cal.

Because 1 cal= 4.184 J​, then

[tex]\tt =1.03\times 10^4\times 4.184\\\\=\boxed{\bold{4.31\times 10^4~J}}[/tex]

Answer:

left to right

The periods go on a periodic table, left to right. The periodic table is the systematic arrangement of elements in row and column.

The chemical elements are arranged in rows and columns in the periodic table, sometimes referred to as the periodic table of the elements. It is often used in physics, chemistry, and other disciplines, and is frequently regarded as a symbol of chemistry.

Because of the orderly arrangement of the elements, it is known as the periodic table. Periods refers to the horizontal rows, and Groups to the vertical columns.

The most significant role of hydrogen in the human body is to maintain your level of hydration, making it the most significant element on the periodic table.

All known elements are grouped together in the periodic table of elements into groups with related characteristics. It becomes a crucial tool for chemists, nanotechnologies, and other scientists as a result. You can forecast how chemicals will behave if you learn to utilize and comprehend the periodic table.

Thus, The periods go on a periodic table, left to right.

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Answer:

Its a mixture.

oxygen has 6 valence electrons and 2 electrons and carbon has 4 electron

Answer:

4!!!!!!!!!!

Explanation:

i got it right

Answer:

mercury or Hg

Explanation:

i looked at the periodic table haha

hope this helps and is right <3

A sample of oxygen gas at STP is depicted in the diagram in the picture (4) of the image attached.

An oxygen molecule is a diatomic molecule, which is a molecule made up of just two atoms of the same element. The oxygen molecule in this instance is made up of two oxygen atoms.

If you have a lot of oxygen atoms at STP, they will spontaneously combine to produce O₂ because double bonds between oxygen atoms make their structure more stable.

If we carefully examine the figure in the attached image, we will see that it depicts a molecule made up of two atoms of the same element, which perfectly matches the definition of the oxygen molecule.

Therefore, this is shown in diagram (4), spontaneously combine to produce O₂  because double bonds between oxygen atoms make their structure more stable.

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answer

yes

Explanation:

Answer:

Evaporation

Explanation:

because the ammonia is left unclosed

The smell of ammonia has been spread from a corner to entire room by the process of diffusion. Thus, option B is correct.

Ammonia has been the liquid compound with the formula [tex]\rm NH_4[/tex]. It has a pungent smell. Ammonia has been used in several synthesis reactions, and in various industrial processes.

The diffusion has been the process of transfer of molecules from higher concentration to lower concentration. The smell of ammonia has been spread in the entire laboratory from a corner.

The ammonia molecules in the bottle are at higher concentration while there has been lower concentration of ammonia in the environment. With the process of diffusion there has been the transfer of ammonia molecules in the environment.

Thus, diffusion has been responsible for spreading the smell of ammonia in the laboratory from a corner. Thus, option B is correct.

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Answer:

Explanation:

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

From the question

volume of liquid = 15 mL

density = 2.5 g/mL

We have

mass = 15 × 2.5

We have the final answer as

Hope this helps you

Answer:

A. 39

Explanation:

Mass number= #protons + #neutrons

19+20= 39

Taking into account the definition of mass number, the correct option is the option A: the atomic mass of the atom is 39.

First of all, all atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).

On the other hand, the mass number tells us the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:

Mass number = (number of protons) + (number of neutrons)

It is represented by the letter A.

In this case:

So:

Mass number = 19 + 20

Solving:

Mass number= 39

In summary, the correct option is the option A: the atomic mass of the atom is 39.

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Answer:

goggles

Explanation:

Answer:

≈0.56 moles or ≈3.37⋅ 10 23 atoms

Explanation:

Answer:

1.0 g/cm3

Explanation:

yeah that's the density of water

Answer:

a 1 g/cm3

Explanation:

per google- A common unit of measurement for water's density is agram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3)

Answer:

true

Explanation:

Answer: false, gases can be more easily compressed than liquids.

Explanation: They're easier to compress because there's much more empty space between the gas particles.

Answer:

Sometimes the whole alloy in a uniform is a solid solution

Answer:

1.829 meters is the answer

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:

controlled by the Arabs, who brought frankincense and myrrh by camel caravan from South Arabia.

Matter cannot be created or destroyed.

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

Or

Conservation of mass means:

In a closed/isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.

So what changes is the form, into a liquid, gas or solid

while what does not change is the mass