what is lattice energy and how is it involved in an ionic bond

Answer:

12.5% is left

Explanation:If the half-life of a reaction is 6 days. What percentage of material is left after 18 days?

18 days/6 days = 3 half lives

each half life you lose half the material

in 3 half lives you have (1/2)x (1/2) x (1/2) =1/8

1/8 =0.125 so 12.5% is left

Answer:

precipitation reaction.

Explanation:

an insoluble substance is called a precipitate, so the reaction is a precipitation reaction.

Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid. HoPe iT doSe WhaT EvEr U nEed IT foR hUmAn

Let's try to understand. Hope this picture can help you:D

Answer:

The answer is 4778.4 cm (cubed)

Explanation:

V = (πr(squared)) x (h/3)

V = (π x 13(squared)) x (27/3)

V = 530.9291585 x 9

V = 4778.4

Answer:

Explanation:

There are two 250 mL aq solutions. The first solution is potassium chromate and the second is silver nitrate. The masses of the solute in each of the solutions are the same. After the reaction was completed, the precipitate was found to have a mass of 167 g. Calculate the concentration of potassium ions in the original potassium chromate solution.

K2CrO4  + AgNO3-----> Ag2CrO4 + KNO3

Ag2CrO4 HAS A MOLECULAR WEIGHT OF 2(108x2) + 52 + (4X16) =

216 + 52 + 64 =332

167gm/332= 0.51 moles which has 0.51 moles of CrO4 and required

2X0.51 moles K=1.02 moles of K

the original solution was 250 ml or 0.250L and had 1.02 moles/0.250L=

4.1 moles/L of K or 4.1 M of K

Answer:

s-2 p-6 d-10 f-14

Explanation:

s orbital max can fit 2 electrons

p orbital max can fit 6 electrons

d orbital max can fit 10 electrons

f orbital max can fit 14 electrons

Answer:

yes he forced up then avoid it

Answer:

E

Explanation:

Answer:B

Explanation:

Answer:

The Bismuth atom

Explanation:

it contains 83 atoms, 5 of which are valence electrons. These 5 electrons are accommodated in the 6s and 6p orbital.

Answer:

A nucleophile view the full answer Question 3 (1 point) What is the first step in nucleophilic addition under acidic conditions? Protonation of the nucleophile Addition of the nucleophile Loss of water Protonation of the carbonyl

Explanation:

Answer:

the first step, which is rate-determining, an electrophilic reagent adds to the pi bond. In the second step a nucleophilic reagent adds to the electron deficient intermediate that was formed in the first step.

Explanation:

When a bath bomb comes in contact with water, the baking soda and citric acid react to make carbon dioxide bubbles. This is an acid–base reaction, where baking soda (also called sodium bicarbonate) is a weak base and citric acid is a weak acid.

Answer: Reactants-Products

A part of our body that protect the heart and lungs is known as The rib cage

Considering the ideal gas law, the ratio of the final to the initial number of moles in the container is 4.

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P× V = n× R× T

Then ,the number of moles can be expressed as:

[tex]n=\frac{PxV}{RxT}[/tex]

In this case, a container filled with an ideal gas is connected to a reservoir of the same gas so that the number of moles in the container can change. You want to know the ratio of the final to the initial number of moles in the container, this is, [tex]\frac{n_{final} }{n_{initial} }[/tex].

The number of moles [tex]n_{initial}[/tex] can be expressed as:

[tex]n_{initial} =\frac{P_{initial} xV_{initial} }{RxT_{inital} }[/tex]

and the number of moles [tex]n_{final}[/tex] can be expressed as:

[tex]n_{final} =\frac{P_{final} xV_{final} }{RxT_{final} }[/tex]

Then:

[tex]\frac{n_{final} }{n_{initial} } =\frac{\frac{P_{final} xV_{final} }{RxT_{final} }}{\frac{P_{initial} xV_{initial} }{RxT_{initial} }}[/tex]

Being R is a constant number:

[tex]\frac{n_{final} }{n_{initial} } =\frac{P_{final} xV_{final} }{T_{final} }x\frac{T_{initial} }{P_{initial} xV_{initial} }[/tex]

The pressure and volume of the container are each doubled while the temperature is held constant, then you know:

Replacing in the the ratio of the final to the initial number of moles:

[tex]\frac{n_{final} }{n_{initial} } =\frac{2xP_{initial} x2xV_{initial} }{T_{initial} }x\frac{T_{initial} }{P_{initial} xV_{initial} }[/tex]

[tex]\frac{n_{final} }{n_{initial} } =\frac{4xP_{initial} xV_{initial} }{T_{initial} }x\frac{T_{initial} }{P_{initial} xV_{initial} }[/tex]

[tex]\frac{n_{final} }{n_{initial} } =4}[/tex]

Finally, the ratio of the final to the initial number of moles in the container is 4.

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Answer:

you need to move one of the dots from Ca to the one at Cl like the arrows show

Explanation:

Answer:

600K

Explanation:

P1/T1 = P2/T2

T2 = P2T1/P1

T2 = (1.5atm)(400K)/1atm

T2 = 600K

Answer:

a Pure substance contains of only one element or 1 compound

Explanation:

Substances such as Nitrogen, water, and oxygen,

are pure substances because they have a secure chemical composition throughout it's molecules. So basically they are substances or compounds with distinct chemical properties and a constant composition.

Hope this helps have a great night/day!

I can only tell you that when a atomic level is hig it as more electro around the electron cloud and it means that it is harder to be unstable

Answer:

The gun-type assembly uses a conventional explosive to compress from one side, while the implosion assembly compresses from all sides simultaneously. The immediate energy release per atom is about 180 million electron volts (Me).

Explanation:

The number of particles in 28.5 g of sodium chloride, NaCl is 2.93×10²³ particles

From Avogadro's hypothesis,

1 mole of NaCl = 6.02×10²³ particles

But,

1 mole of NaCl = 23 + 35.5 = 58.5 g

Thus, we can say that:

58.5 g of NaCl = 6.02×10²³ particles

58.5 g of NaCl = 6.02×10²³ particles

Therefore,

28.5 g of NaCl =

[tex] \frac{28.5 \times 6.02 \times {10}^{23} }{58.5} [/tex]

Thus, the number of particles in 28.5 g of sodium chloride, NaCl is 2.93×10²³ particles

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Answer: Cork grows naturally in only two areas of the world: the Mediterranean region of Europe – particularly the Iberian Peninsula, where Portugal and Spain produce more than 80% of the world's cork – and Northwest Africa.

Explanation:

Answer:

Explanation:

if matter is made of many tiny particles, why does it seem to be continuous? Why doesn’t water seem to behave like sand?

Water and some other molecules exhibit a property know as hydrogen bonding.  A hydrogen atom in one molecule of water is attracted to the oxygen in a neighboring molecules of water.'

The force of this attraction is less than a standard chemical attractive force, but it is real and measurable.

When billions and trillions of water molecules are held together by this force, the small amount of molecule to molecule force is added up to a tremendous force.  That is why even though sulfur is below oxygen on the periodic table, hydrogen sulfide is a gas while hydrogen oxide is a liquid at room temperature.

Hydrogen bonding explains the unique properties of ice, liquid water and steam,We all know water exists in several forms such as solid, liquid and ice. Water boils at 100  C and freezes at 32  F, right? Am I correct? Let us look at some of the chemistry behind forms of water.  

The strong polar bond between water molecules creates water cohesion.

As they are cooled, aggregates of most other substances increase monotonically in density becoming progressively heavier -- the colder they are, the more tightly packed their molecules become. But water possesses a peculiar physical feature: ice expands, so it is lighter than liquid water (i. e., ice floats). When water trapped in rock crevices freezes, it breaks rocks (and pipes).

Water is vital to all known life forms, that is, all those on planet Earth. It is so integral to life as we know it that many biologists cannot even envision life without water (although that might be possible). Indeed, the physical properties of water dictate critical thermal limits for living systems.

In one sci-fi story, an alien refers to humans as "ugly bags of mostly water" -- our bodies are about 60-70% water, depending upon how dehydrated we are at any given time. Humans use massive amounts of freshwater to drink, cook, bathe, flush toilets, do laundry, fill swimming pools, irrigate yards and gardens, run flowing fountains, and for recreation. Precious clean water is often wasted, such as when people leave tap water running while washing their hands or brushing their teeth. The personal water consumption of an average American is about 200 gallons per day, but when industrial and energy usage is added in, per capita freshwater usage is more than 2000 gallons/day. People in third world countries use much less water, of course.

Most freshwater is claimed or "owned" and there is not enough to go around. Approximately half of the world's population of people do not even have adequate access to clean drinking water. One of the major symptoms of the human overpopulation crisis is shortages of available fresh water. Wars will be fought over water.

Hydrogen bonding is a property of water and some other molecules. A hydrogen atom in one water molecule is attracted to an oxygen atom in another water molecule.

Matter is a substance composed of various particle types that occupies physical space and has inertia.

According to modern physics principles, each type of particle has a distinct mass and size. The electron, proton, and neutron are the most well-known examples of material particles.

Atoms and molecules are tiny particles that make up solids, liquids, and gases.

This attraction has a lower force than a standard chemical attractive force, but it is real and measurable.

When this force holds billions and trillions of water molecules together, the small amount of molecule to molecule force adds up to a tremendous force.

Thus, due to these bonds, the water does not seem to behave like sand.

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Answer:

The element phosporus is located to the right of the element magnesium along the same period in the periodic table. Which best describes the relationship of the elements? Magnesium has a larger atomic number.