show work!!
A sample is 54.7g CaCl2 and 53.64 g H20. How
many water molecules are associated with this
hydrate?

The kinetic energy of 429 kJ and the specific heat of the substance is 9059 g kJ °C

The kinetic energy is given as ,

K.E = 1/2 m\(v^{2}\)

Where m = mass = 1599 kg

v = velocity  = 83.4 km/h = 23 m/s

Putting the value mass and velocity in equation ( i ) we get ,

K.E = 1/2 × 1599 kg × 23 m/s × 23 m/s = 429074.86 J = 429 kJ

Specific heat is calculated as ,

Q = mcΔT

mass of the substance ( m ) = 56.87 g

c = 1475 J

ΔT = 138.4 °C - 30.0 °C = 108 °C.

Putting the value of mass , change in temperature and heat absorbed in equation ( ii ) we get ,

Q = 56.87 g × 1475 J × 108 °C = 9059391 gJ°C = 9059 g kJ °C

learn about kinetic energy

https://brainly.com/question/12669551

#SPJ1

Answer:

2AlBr₃\(_{aq}\)   +    3Cl₂\(_{g}\)  →    2AlCl₃\(_{aq}\)   + 3Br₂\(_{g}\)

Explanation:

The word equation is:

   Aqueous aluminum bromide and chlorine gas react to form aqueous  aluminum  chloride and bromine gas  

 Reactants:

     aluminum bromide  = AlBr₃

     chlorine gas  = Cl₂

 Products:

      aluminum chloride  = AlCl₃

      bromine gas  = Br₂  

So;

        2AlBr₃\(_{aq}\)   +    3Cl₂\(_{g}\)  →    2AlCl₃\(_{aq}\)   + 3Br₂\(_{g}\)

Answer:

Because the sugar flour and eggs can no longer be separated. The properties of the materials have changed so it's a chemical change

Sugar, flour, and eggs cannot be separated. The materials' properties have changed, resulting in a chemical change.Therefore, crumbling a cookie is not a physical change.

Physical changes affect a chemical substance's form but not its chemical composition. Physical changes can be used to separate mixtures into their component compounds, but not to separate compounds into chemical elements or simpler compounds.

A chemical change is the transformation of one material into another, the formation of new materials with different properties, and the formation of one or more new substances. It occurs when one substance reacts with another to form a new substance.

A physical change is characterized by a change in physical properties. Melting, transition to a gas, change in strength, change in durability, changes in crystal form, textural change, shape, size, colour, volume, and density are all examples of physical properties.

Thus, crumbling a cookie is not a physical change.

To learn more about physical change, follow the link;

https://brainly.com/question/3680148

#SPJ2

Answer:

Explanation: The aldehydes in which the aldehydic functional group (−CHO) is attached to a saturated carbon chain are called Aliphatic aldehydes.

Answer:

sadgsddagd

Explanation:

how are you doing?

Answer:

they can carry cold arctic air, producing snow and freezing weather.

Explanation:

-w- hope it helps

Valence electrons are electrons that are in the outermost orbitals of an atom. In the periodic table the elements are divided into groups. All elements of the first main group have one valence electron. All elements of the second main group have two valence electrons. And so on:

Answer:

The solar system formed from a cloud of gas and dust, known as the solar nebula, that collapsed under its own gravity about 4.6 billion years ago. As the solar nebula collapsed, it formed a spinning disk of gas and dust, with most of the material concentrated at the center. Over time, the material in the disk began to clump together due to gravity, forming small rocky and icy planetesimals, which collided and merged to form larger bodies. These larger bodies eventually became the planets, moons, asteroids, and other objects that make up the solar system today. The exact composition of the solar nebula and the materials that formed the solar system varied depending on the distance from the Sun and the temperature and pressure conditions in different regions of the nebula. Generally, the inner solar system (including the Sun, Mercury, Venus, Earth, and Mars) is composed mostly of rocky materials, while the outer solar system (including the gas giants Jupiter, Saturn, Uranus, and Neptune, as well as the dwarf planet Pluto) is composed mostly of ices, such as water, ammonia, and methane, as well as gases like hydrogen and helium.

short term answer: dust and gas.

Explanation: learned it in 5th grade science class, bye have a great day !

The correct valence for ions of the following elements are:

Ca: 2+

Cl: 1-

O: 2-

Al: 3+

K: 1+

What is valence?

To know more about valence, click the link given below:

https://brainly.com/question/866518

#SPJ1

answer:

Explanations:

The given model of metal lattice represent the metallic ions as spheres. The model is very easy to use however, the it does not represent the delocalization of electrons.

Metals have some peculiar features including malleability, ductility, luster high conductivity etc. These properties are based on the metal -metal bonds between the metallic particles in the lattice.

A metal lattice is a pool of mobile electrons and ions. They can be easily dislocated that is why metal is malleable.  The given model of metal lattice represents the metallic particles as spheres. It is easy to show how the particles can dislocate on a pressure applied.

However, it is not describing the delocalization of electrons and metal -metal bonding within the lattice. But it is enough to show the dislocation at the boundary and easiness to be flattened.

Find more on metals:

https://brainly.com/question/28931986

#SPJ1

Answer:

Ions.

Explanation:

Ions are the free moving, charged particles in a molten mixture of aluminum oxide and cryolite because the liquid state loosely held the molecules and the the molecules can easily move from one place to another. These ions helps in the conduction of electricity in the solution due to its free movement so we can say that ions are the charge particles that moves freely in the mixture of aluminum oxide and cryolite.

The free moving, charged particles in a molten mixture of aluminium oxide

and cryolite are known as Ions.

Ions are referred to an atom or compound which possesses an electrical

charge.The charge could be positive or negative and the positive ions are

called cations while the negative ions are referred to an anions.

Ions are usually free moving, take part in chemical reactions and help to

conduct electricity as a result of them being transferred from one point to

another.

Read more on https://brainly.com/question/7222067

Answer:

a. 0.2355052g

Explanation:

a)

1000ml of NaOH contain 0.241moles

24.43ml of NaOH contain (24.43*0.241)/1000 moles

= 0.00588763moles

Relative Molecular Mass of NaOH

= 1*23 + 1*16 + 1*1

= 40

1mole of NaOH weighs 40g

0.00588763moles weigh (0.00588763*40) g

= 0.2355052g

B)

NaOH -> Na+ + -OH

1 mole of NaOH dissociates to form 1 mole of -OH ions

1 mole of a substance contains 6.02*10^23 particles(atoms)

= 0.00588763 * 6.02 *10^23

= ______ions

Answer:

A will float on top of B.

Explanation:

B is more dense. example A is oil and B is water.

Answer:

I think it is c

Explanation:

I'm sorry if I'm wrong had to look up aquifers

aquifer-a body of permeable rock which can contain or transmit groundwater

landfills, agricultural regions, and gas stations can contaminate an aquifer.

The aquifer is a layer of liquid rock beneath the earth. Underground water is contaminated by excavation and quarrying, increased fertilizer use, and septic tank leakage.

Therefore, the correct choices are "Option B, Option C, and Option E".

Find out more about the contamination here:

brainly.com/question/9923376

The number of molecules in 59.73 grams of the theoretical acid, borofuric acid, would be 6.44 x \(10^2^3\) molecules.

According to Avogadro, 1 mole of any substance contains 6.022 x \(10^2^3\) molecules.

Recall that: number of moles in a substance = mass of the substance/molar mass of the substance.

Molar mass of borofuric acid, \(H_2B_2O_2\):

H = 1 g/mol

B = 10.8 g/mol

O = 16 g/mol

              (1x2) + (10.8x2) + (16x2) = 55.6 g/mol

Number of moles of 59.73 grams  \(H_2B_2O_2\) = 59.73/55.6

        = 1.07 moles

Since 1 mole = 6.022 x \(10^2^3\) molecules

1.07 moles of borofuric acid = 1.07 x 6.022 x \(10^2^3\) molecules.

                                            = 6.44 x \(10^2^3\) molecules

Thus, 59.73 grams of borofuric acid contains 6.44 x \(10^2^3\) molecules.

More on Avogadro's number can be found here: https://brainly.com/question/11907018

#SPJ1

Nuclear reactions include a change in the nucleus of an atom, which typically results in the production of a new element. Contrarily, chemical reactions only require the rearrangement of electrons and do not affect the nuclei; rather, they entail changes in bonding.

What is a nuclear reaction & a chemical reaction?

Therefore it is concluded that option (B) is correct.

Learn more about the nuclear reaction here:

https://brainly.com/question/13315150

#SPJ1

Increases the pressure          l

_____________________

Removing Energy                    l

Answer:

C. After they become infected even if they look and feel healthy.

Explanation:

HIV is a virus and even when you don't have symptoms, if you have it, you can still infect others. Not taking an HIV test doesn't mean you don't have it, it just means that you don't know that you have it. And I don't think an opportunistic infection would really change the affect of a virus spreading.

A virus can spread no matter the circumstances, it doesn't care what type of person you are or what background you have; and it's kind of like cancer in that way.

1

1

The general molecular formula for phenol is C6H5OH. It is an aromatic organic compound with a hydroxyl group bonded to a carbon atom of a cyclic structure. The ring structure has alternate double and single bonds. The formula of phenol is C6H5OH. Benzene has the formula C6H6. It is a hexagonal ring of six carbon atoms bonded with alternate single and double bonds. Each carbon atom in benzene has a bond with a hydrogen atom. In phenol, a hydroxyl group replaces one of the hydrogen atoms.

The reaction of CuCl2, HNO3, and AgNO3 is a redox reaction. In a redox reaction, one substance loses electrons and is oxidized, while another substance gains electrons and is reduced. In this reaction, CuCl2 is oxidized to Cu2+, HNO3 is reduced to NO, and AgNO3 is reduced to Ag.

The balanced equation for the reaction is:

CuCl2 + 2HNO3 + 2AgNO3 → Cu2+ + 2NO + 2AgCl

The products of the reaction are copper(II) ions, nitrogen monoxide gas, and silver chloride precipitate.

Here are some of the properties of phenol:

Phenol is a white crystalline solid that is soluble in water.

Phenol has a strong, characteristic odor.

Phenol is a mild acid.

Phenol is toxic and can cause burns to the skin and eyes.

Phenol is used in a variety of products, including disinfectants, antiseptics, and plastics.

From the calculations, the change in energy is - 190 J.

From the first law of thermodynamics, the energy is neither created nor destroyed but is transformed from one form to another.

From the law;

U = q + w

U = internal energy

q = heat

w = work

Since work is done on the surroundings and the gas absorbs heat then;

U = 132 J - 322 J

U = - 190 J

Learn more about thermodynamics:https://brainly.com/question/1368306

#SPJ1

Answer:Earth's protective magnetic bubble, called the magnetosphere, deflects most solar particles. ... The International Space Station cruises through low-Earth orbit, within Earth's protection, and the station's hull helps shield crew members from radiation too.☘

have a nice day

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

there are an infinite number of ways to synthesize an answer to a question, including the following:

Summarize the key points in a concise manner.

Provide a detailed explanation of the topic.

Use examples or analogies to illustrate the concept.

Break down the answer into smaller, more digestible pieces.

Address potential counterarguments or alternative perspectives.

Incorporate relevant statistics or data to support the answer.

Compare and contrast different aspects of the topic.

Provide historical context or a timeline of events.

Use a storytelling approach to engage the reader.

Use a Q&A format to organize the information.

To know more about answer synthesize, visit:

https://brainly.com/question/30029537

#SPJ1

Answer:

your answer should be the bottom

sorry if im wrong

Explanation:

As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

Learn more about reactions:

https://brainly.com/question/25769000

Evidence that the spectrum is consistent with the atomic model is that the neutral atom of an element contains exactly two electrons.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

Learn more about element,here:

https://brainly.com/question/14347616

#SPJ1

✔ When air molecules collide with things around us, it produces pressing force , which is measured with a Pressure gauge.

Answer:

hydrogen, nitrogen, oxygen, flourine, chlorine, iodine, bromine

Explanation:

they are very reactive and thus cannot exist as monoatomic elements

The seven diatomic elements are;

According to the question;

The diatomic elements as listed above are different from the rest of the elements in that they exist as molecules.

This is as a result of the high electron affinity of these elements. Consequently, they form molecules with atoms of themselves.

Read more:

https://brainly.com/question/11446176