Now balance the chemical
reaction by providing the
correct coefficients:
carbon monoxide + hydrogen gas yields
water + methane (CH4)


[?]CO + [?]H2 →[?]H20+ [?]CH4

Answer:

Explanation:

d. 452 4p

hope it helps

Answer:

A

Explanation:

It seems most appropriate since it's the transfer of heat in fluids including air

Heat is meant to be transferred by convection as energy is transferred through moving currents of warmer air or liquid which is in option a as  it involves the transfer of thermal energy through the movement of a fluid.

In convection process, the warmer regions of the fluid or liquid become less dense, which is causing them to rise. As the warmer fluid rises, it carries thermal energy with it as its properties change. while, the cooler regions of the fluid became denser, and that led to sink. This creates a continuous circulation of the fluid, which helps to distribute the heat in the area.

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Answer:

B. The region outside a nucleus where the electron is moving

Explanation:

The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.

Answer:

Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.

:D

Answer:

SrSO4

Explanation:

According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water.

Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.

Since SrSO4 is a sulphate of a group two element (strontium) it will be the insoluble solid product of the double displacement reaction described in the question.

Answer:

SrSO4

According to solubility rules, we know that the sulphates of the elements of group two are insoluble in water. The solubility rules describe what chemical species are soluble in water and what species are not soluble in water. Generally, all chlorides are soluble in water with exception of chlorides such as silver chloride. The chlorides of group one elements are usually highly soluble in water.  

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Answer:

Atoms of different elements, having gained or lost electrons, form negative and positive ions that are bonded together by attractive forces between ions with opposite charges.

Explanation:

The atoms have different numbers of neutrons and the same number of protons. hope this helps you :)

Amino acid is the type of molecule shown in the image.

Amino acids are small molecules that are the building blocks of proteins.

Amino acids are the smaller component pieces, called monomers, that are joined together to make the longer strand, or polymer, which is a protein.  Amino acids are joined by covalent bonds called peptide bonds to make a polypeptide chain, which eventually creates proteins in our cells.  There are 20 different amino acids in our cells that come together in a unique order to create the proteins organisms need.

Hence, an amino acid is the type of molecule shown in the image.

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Answer:

4 mol H3PO4

Explanation:

Answer:

John Dalton with his atomic theory reintrodcued the theroy of atoms

Explanation:

Around 450 B.C., the Greek philosopher Democritus introduced the idea of the atom. However, the idea was essentially forgotten for more than 2000 years. In 1800, John Dalton re-introduced the atom. He provided evidence for atoms and developed atomic theory

Explanation:

Answer:

D

Explanation:

metal is a major cunductor of heat

A cup made of metal would have the best thermal conductor properties.

The answer is option D.

Metals have unfastened electrons that are not bounded to the atoms. those electrons are unfastened to move around within the metal, colliding with the metal atoms and shifting heat to them successfully. This makes metals higher conductors of warmth than maximum other materials.

Diamond is the leading thermally conductive material and has conductivity values measured 5x better than copper, the maximum synthetic metallic inside the united states of America. Diamond atoms are composed of a simple carbon spine this is a really perfect molecular structure for an effective heat switch.

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Answer:

Here's what I get  

Explanation:

1. Names

I.   CH₃-CH₂-COOH              = 49. propanoic acid

II.  CH₃-CH₂-OH                    = 46. ethanol

III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate

IV. H-O-CH₂-CH₂-CH₃         = 48. propan-1-ol

V.  H-COO-CH₃                    = 51. methyl methanoate

VI. CH₃-COOH                      = 50. ethanoic acid

2. Precursors

52. methyl propionate  ⇒ methanol + propanoic acid

53.   ethyl methanoate ⇒    ethanol + methanoic acid

B

The arrangement of a substance's molecules changes when it changes phases, but its temperature remains constant. The substance absorbs thermal energy from its surroundings to undergo a phase shift if the new arrangement has a larger thermal energy content. The substance releases thermal energy onto its surroundings if the new arrangement contains less thermal energy.

A substance's physical characteristic is its latent heat of vaporization. Its definition is the amount of heat needed to transform a single mole of liquid at its boiling point at mean atmospheric pressure. It is stated in terms of kg/mol or kJ/kg. The energy causes a liquid substance to transition from a liquid form to a vaporous one.

Answer:

As you go across a period, radius shrinks because you are adding protons. The added positive charge increases pull on the electron shells. So I believe the answer is D

The statement, that describes the atomic radius change down a column of the periodic table is "the larger the highest energy level number, the larger the atomic radius."

The size of an atom is described by its atomic radius. Atomic radius is commonly defined as the total distance from an atom's nucleus to the electron's outermost orbital.

The atomic radii of elements steadily grow from top to bottom in a group. As we move down the group, the atomic number rises, and so does the number of shells. Furthermore, as we advance down the group, the valence electrons are present in a higher shell, increasing the distance of the valence electrons from the nucleus. As a result, the attraction between the nucleus and the valence electron weakens. When a result, as one moves along a group, the atomic radius grows.

As the number of energy levels (n) decreases down a group, the distance between the nucleus and the outermost orbital rises. As a result, the atomic radius increases.

Hence, the correct option is D.

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Answer:

the electron releases engery in the form of light

Explanation:

it's science i don't know how to explain sorry

Answer:c

Explanation:

Answer:

See below.

Explanation:

Take a look at the attachment( s ) below. One has an explanation, the other has the lewis dot structure solution;

The compound with molar mass 28 g/mol has been ethylene, with the molecular formula [tex]\rm \bold{C_2H_4}[/tex].

The Lewis structure has been the structure of the molecule consisting of the number of bonds present in the compound. The given compound has been 100% weight/weight.

The percent of carbon  = 85.7%

The percent of hydrogen = 14.3%

The compound has molecular mass = 28 g/mol

Since, the given percent of hydrogen and carbon has been weight %. The mass of hydrogen and carbon has been:

Mass of carbon = 85.7 g

Mass of hydrogen = 14.3 g

The moles of hydrogen and carbon in the compound has been:

[tex]\rm Moles\;=\;\dfrac{Mass}{Molecular\;mass}[/tex]

Moles of carbon can be given as:

[tex]\rm Moles\;of\;carbon\;=\;\dfrac{85.7\;g}{12.01\;g/mol}[/tex]

Moles of carbon = 7.13 mol

Moles of hydrogen can be given as:

[tex]\rm Moles\;of\;hydrogen\;=\;\dfrac{14.3\;g}{1.008\;g/mol}[/tex]

Moles of hydrogen = 14.19 mol

In the given molecular compound, the number of atoms of hydrogen and carbon has been calculated with respect to carbon moles, to give the empirical formula of the compound.

The atoms of carbon has been:

[tex]\rm Carbon\;=\;\dfrac{7.13}{7.13}[/tex]

Carbon = 1

The atoms of hydrogen has been:

[tex]\rm Hydrogen\;=\;\dfrac{14.19}{7.13}[/tex]

Hydrogen = 2

The empirical formula of compound has been [tex]\rm \bold{CH_2}[/tex].

The compound has molar mass 28 g/mol.

The mass of [tex]\rm \bold{CH_2}[/tex] = 14 g/mol

The number of empirical formula unit has been given as:

[tex]\rm Number\;of\;empirical\;formula\;unit\;=\;\dfrac{14}{28}[/tex]

Number of empirical formula unit = 2

Thus the molecular formula of the compound has been [tex]\rm \bold{C_2H_4}[/tex]. The attached image has been the structure of ethylene.

The compound with molar mass 28 g/mol has been ethylene, with the molecular formula [tex]\rm \bold{C_2H_4}[/tex].

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There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore,  a glass of table wine contains 12% alcohol in it.

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

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

There are so many drinks in markets which differ in the percentage of alcohol present in them. A glass of table wine contains 12% alcohol in it.

Therefore,  a glass of table wine contains 12% alcohol in it.

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Answer:

Billions

Explanation:

A full stop contains almost trillion of atoms.

Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.

An atom consists of a central nucleus that is usually surrounded by one or more electrons.

Billions of atoms would it take to make a stack as thick as a potato chip. Hence, option C is correct.

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Answer:  Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

Explanation: Baking is a chemical change you cant turn it back to what it was before. Its chemical properties have changed. Melting is a physical change. Its chemical properties are still the same it has not changed. It just changed it's physical form but the object is still the object.

Answer:

Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

Explanation:

took the quiz on edge

Answer: 23927 cups of coffee would be required to fill the world record coffee cup.

Explanation:

Volume of cup of coffee = 318 ml

Volume of largest cup (world record coffee cup) of coffee = 2010 gallon  

Volume of largest cup of coffee in ml = [tex]2010\times 3785.41=7608678ml[/tex]  ( 1 gallon = 3785.41 ml)

To find : Number of cups of coffee to fill world record coffee cup = x

Thus as we know :

[tex]{\text {Number of cups of coffee to fill world record coffee cup}}\times {\text {Volume of cup of coffee}}={\text {Volume of largest cup (world record coffee cup) of coffee}}[/tex]

Putting in the values we get:

[tex]x\times 318ml=7608678ml[/tex]

[tex]x=23927[/tex]

Thus 23927 cups of coffee would be required to fill the world record coffee cup.

Answer: 7,793 hours.

Explanation:

Let's assume you are about 150 pounds. You would use only 414 calories a night (1.7 kJ). If 250 kJ is 100 g, then 1500 kj is 600 g. So we would need 360000 calories to be eaten. You would have to sleep for about 7,793 hours.

Answer:

endothermic reaction

Explantion:

The definition for endothermic is:

describing a process that involves the absorption of energy from the surroundings by substances undergoing change.

Think of en-dothermic as energy entering and ex-othermic as energy exiting.

Answer:

Endothermic

Explanation:

On Edge :)

Answer:

Genes Rule

Explanation:

The color of a dog's coat is basically at the mercy of his gene pool. Genes do two things that determine a dog's appearance. They control the pigments produced (eumelanin and phaeomelanin) and where these pigments are produced.

An elements's emission spectrum determines the electron energy levels and the correct option is option C.

An element's emission spectrum is determined by the specific energy levels of its electrons. When an electron in an atom transitions from a higher energy level to a lower energy level, it releases energy in the form of electromagnetic radiation.

The wavelength and frequency of this emitted light correspond to specific energy differences between the electron energy levels. Each element has a unique arrangement of electron energy levels, leading to a distinct emission spectrum.

By analyzing the emitted light, scientists can identify the element and gain insights into its atomic structure. The size of the sample, mass of the nucleus, and number of protons do not directly determine an element's emission spectrum.

Thus, the ideal selection is option C.

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Answer:C.people with perfect understanding of science.

Answer:

C. People with perfect understanding of science

Explanation:

Similar personalities, different backgrounds, and only one perspective are just traits of people.

Perfect understanding of science is relating to a scientist. Scientists have high knowledge of science.

Answer:

Take a look at explanation below.

Explanation:

Part 1 ) A homogeneous mixture of two different substances, by definition, is a solution. A homogeneous mixture itself is known to have same proportions of its components throughout any given sample. Thus it is possible to have two different compounds in this mixture, but still let it distribute among themselves evenly.

_______________________________________________________

Part 2 ) How is this possible? Take the simple example of " mixing salt with water. " This is a solution. The salt ( dissolved material ) is present in the same amount throughout the solution, as it evenly distributes itself.

A homogeneous mixture is formed when;

A homogeneous mixture is one in which there is no phase difference. A homogeneous mixture has a continuous uniform composition throughout the system.

For instance, water and ethanol are miscible in all proportions hence a mixture of the two is an example of a homogeneous mixture.

Also, when sugar is dissolved in water, the sugar completely disappears and become a continuous phase. The resulting solution is a homogeneous mixture.

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Answer:

A. A method of testing an idea

Explanation:

The steps of the scientific process involve formulating a hypothesis, testing it, analysing the data, making conclusions, and reporting the findings.

Answer:

the epigenetic perspective. ... Such variation among organisms with virtually identical chromosomal DNA sequences has largely been attributed to the effects of environment.Explanation:

Answer:

the answer is Cold climates favor mechanical weathering.

Explanation:

I got 100% on the Quiz

Statement that describes climate effect on the rate of weathering as regards this question is A:Cold climates favor mechanical weathering.

Option B,C,D are wrong because high temperature brings about increase in rate of chemical weathering.

Therefore, option A is correct.

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the other guy is totally wrong. the answer is a for sure. C is showing a covalent bond between 3 atoms. Metals bond differently. Like shown in a and b. However b is innacurate because it shows the electrons being the largest(since they are negatively charged and there is a - sybmol), and we all know protons are much larger than electrons. SO a is correct because it depicts the positive protons(+ symbol) as the biggest. So go with a.