please answer thank tou

Answer:  

Therefore, 12 moles of hydrogen makes 8 moles of ammonia.

Using the proportions of the amount of the molecules, we can convert from any reagent or product to any other reagent or product. In the context of this reaction, for every mole of N2 and every 3 moles of H2 we obtain 2 moles of NH3.

Explanation:

;)’ hola

Based on the assumption that the reaction involves N and O to produce NO, if 25.0 g of NO are produced, the amount of N gas used would be 11.66 grams

From the equation of the reaction:

       N + O ---------> NO

Mole ratio of N to NO is 1:1

Mole of 25.0 g of NO = 25/30.01 = 0.833 moles

Equivalent mole of N = 0.833 moles

Mass of 0.833 moles N = 0.833 x 14 = 11.66 grams

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Answer:

Solids dont flow because there is a strong attraction between the atoms, keeping them bonded together tightly.

Explanation:

They will continue being solid until temperature is increased at the melting point.

Answer:

i think your answer is d  

Explanation:

sorry if it is wrong

For a Cu/Cu2+ concentration cell has a voltage of 0.21 V at 25 ∘C, the concentration  is mathematically given as

c1=2.7*10^6.77m

Generally, the equation for the Chemical reaction  is mathematically given as

Cu---->cu  +2^e    O

2e+Cu+2  ---->Cu    R

Therefore

[tex]Ecell=\frac{0.0591}{n}log(c2/c1)\\\\0.25=\frac{0.0591}{2}log(1.6*10^{-3}/c1)[/tex]

c1=2.7*10^6.77m

In conclusion, the concentration is

c1=2.7*10^6.77m

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Answer:

D

Explanation:

Does not require energy ...may be slow or fast....

Answer:

C. The temperature at which the solution freezes is lowered.

Answer:

160

Explanation:

p*v/t = constant

or

p1*v1/t1 = p2*v2/t2

pressure is not stated in question so we get rid of it on both sides

v1/t1 = v2/t2

we are finding temperature so we flip the entire equation

t1/v1 = t2/v2

200/5 = t2/4

4(200/5) = t2

=160

Answer:

Yes it is 160K as the first person said

The number of energetically equivalent ways that one can distribute the particles in system A and B are 1 and 6 respectively.

From thx complete information, system A has only 1 distribution that's possible.

For system B, the number of ways will be:

= 3 × 2 × 1

= 6

In conclusion, the correct options are 1 and 6 respectively.

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Answer:

Thus, the joules of heat absorbed when 70.0 grams of water is completely vaporised at its boiling point are 158,200.

Chemist prefer to use kipp’s apparatus for the production of hydrogen sulphide instead of woulf’s bottle because they produce gas without generating heat.

Kipp's appratus and woulf's bottle both are the laborartory appratus and used in the analytical process of any reactions.

Hydrogen sulphide gas will be produced in the laborartory by using both given appratus but we prefer the use of kipp's apparatus because in this apparatus small amount of gas is produced in the controlled heat condition by the reaction between the liquid sulphuric acid and solid iron sulphide.

Hence we prefer kipp's appratus as it produces gas without heat.

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The attractions between anions and cations throughout a crystal are known collectively as ionic bonds.

The ionic bonds are a special type of bond where ions (cations and anions) are mutually attracted.

The ionic bonds are fundamental bonds for the development of certain compounds and molecules.

Ionic bonds may be produced between metal compounds that lose electrons (e-) and non-metals that gain e-.

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Answer:

The pituitary gland is located below the brain. :)

Answer:

They are organized from least to greatest by their atomic number.

Explanation:

Hope that helps!

Answer:

Explanation:

Elements are listed in numerical order by atomic number. The atomic number is the number of protons in an atom of that element. So element number 1 (hydrogen) is the first element. Every atom of hydrogen has 1 proton. Until a new element is discovered, the last element on the table is element number 118. Every atom of element 118 has 118 protons. This is the biggest difference between today's periodic table and Mendeleev's periodic table. The original table organized the elements by increasing atomic weight.

Each horizontal row on the periodic table is called a period. There are seven periods on the periodic table. Elements in the same period all have the same electron ground state energy level. As you move from left to right across a period, elements transition from displaying metal characteristics toward nonmetallic properties.

Each vertical column on the periodic table is called a group. Elements belonging to one of the 18 groups will share similar properties. Atoms of each element within a group have the same number of electrons in their outermost electron shell. For example, elements of the halogen group all have a valence of -1 and are highly reactive.

There are two rows of elements found below the main body of the periodic table. They are placed there because there wasn't room to put them where they should go. These rows of elements, the lanthanides and actinides, are special transition metals. The top row goes with period 6, while the bottom row goes with period 7.

Each element has its tile or cell in the periodic table. The exact information given for the element varies, but there is always the atomic number, the symbol for the element, and the atomic weight. The element symbol is a shorthand notation that is either one capital letter or a capital letter and a lowercase letter. The exception is the elements at the very end of the periodic table, which have placeholder names (until they are officially discovered and named) and three-letter symbols.

The two main types of elements are metals and nonmetals. There are also elements with properties intermediate between metals and nonmetals. These elements are called metalloids or semimetals. Examples of groups of elements that are metals include alkali metals, alkaline earths, basic metals, and transition metals. Examples of groups of elements that are nonmetals are the nonmetals (of course), the halogens, and the noble gases.

The cell notation of the redox reaction between Cu and ClO₃⁻ is:

A voltaic cell or electrochemical cell is a device which produces electricity from chemical reactions occuring within the cell.

The reactions occuring in a voltaic cell are redox reactions.

Oxidation occurs at the anode while reduction occurs at the cathode.

In the given reaction between Cu and ClO₃⁻ as shown below:

Cu is oxidized as follows: 3 Cu (s) → 3 Cu²⁺
ClO₃⁻ is reduced as follows: ClO₃⁻ (aq) → Cl⁻ (aq)

The voltaic cell notation is as follows where Pt is used as an inert electrode in contact with the ClO₃⁻ and Cl⁻:

Therefore, the cell notation of the redox reaction between Cu and ClO₃⁻ shows that Cu is oxidized while ClO₃⁻ is reduced.

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At T 25 ° C (298 K) and P 1 atm are stated by RTP ⇒ Vm = 24.4 liters / mol

86.4 dm³ = 86.4 L = 86.4/24.4 = 3.54 mol

1 mole = 6.02.10²³ molecules

3.54 x 6.02.10²³ = 21.31 x 10²³ molecules

N = 21.31

The shared ancestry of life is reflected in DNA and genetic code. DNA comparisons can reveal how closely two species are related. Biogeography. Evolution and geological change are reflected in the global distribution of life and the particular characteristics of island species.

Answer:

Stalactites - Hang from caves ceilings

Stalagmites - Grow from cave floors

Sinkholes - Collapsed caves

Speleothems - Cave features

Explanation:

Got it right :)

The balanced chemical equation for the reaction between barium hydroxide, Ba(OH)₂ and HNO₃ to produce barium nitrate, Ba(NO₃)₂ is

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O

Chemical equations are representations of chemical reactions using symbols and formula of the reactants and products.

The reactants are located on the left side while the products are located on the right side.

Reactants —> Products

The balancing of chemical equations follows the law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Ba(OH)₂ + HNO₃ —> Ba(NO₃)₂ + H₂O

There are 2 atoms of N on the right side and 1 atom on the left side. It can be balanced by writing 2 before HNO₃ as shown below:

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + H₂O

There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balanced by writing 2 before H₂O as shown below

Ba(OH)₂ + 2HNO₃ —> Ba(NO₃)₂ + 2H₂O

Now, the equation is balanced

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Answer:

1.  Place in a platic bag and use a magnet to attract the iron filings.  [See explanation for an alternative step].

2. Disolve the remainer in water

3.  Pass the liquid through a microporous filter to capture the undissolved sulfur

4.  Evaporate the filtered water to retrieve iron chloride crystals

Explanation:

The Fe(II) chloride will dissolve in water.  It is paramagnetic, and thus is weakly attracted to a magnet.  The process above should not result in attracting the solid Fe(II) crystals.  In fact, it is probably acceptable to dissolve the entire sample in water as the fisrt step.  The dissolved Fe(II) chloride should also not be strongly attraced to a magnet, and htis step would allow easier separation of the iron filings.

Sulfur is not soluble in water, so it will collect as a dsolid in the microporous filter.

The Fe(II) has a high solubility, so it will wind up in the filtered soluition.  Evaopate using heat or vacuum to retrieve the solid Fe(II) chloride crystals (they will be hydrated).

The Co32- ion is a polyatomic molecule and have resonance structure

Resonance structures refer to different sets of Lewis structures that depict and explain the delocalization of electrons in a polyatomic ion or a molecule.

Polyatomic molecules are molecules that are electrically neutral and have three or more atoms held together by covalent bonds. Examples are So3, Co3 and so on.

Therefore, The Co32- ion is a polyatomic molecule and have resonance structure.

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Answer: 3 moles

Explanation: Divide 54 by 18 to get 3.

Aspartame stands for C_14H_18N_2O_5

Molar mass:-

No of moles:-

No of molecules:

Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.

The chemical symbol is CO.

Nickel can be extracted from it's ore through extractive metallurgy. This entails the process of conventional roasting and reduction processes of nickel ore which will produce nickel metal which is greater than 75% purity. In stainless steel applications, 75% pure nickel can be used without been purified furthe purification which depend the components impurities of impurities present in it. Carbon monoxide is use as the reducing agent as it reduce it from nickel oxide to nickel metal.

Therefore, Carbon monoxide with pressure pCO = 0.01 at 800°C is use to reduce the nickel oxide to metallic nickel.

The chemical symbol is CO.

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Answer:

im sorry but this question doesnt make sense

Explanation:

Answer:

Law of Conservation Matter

Answer:

Anabolism builds complex molecules from simpler ones, while catabolism breaks large molecules into smaller ones.

Explanation:

Answer:+6

Explanation:Oxygen always has an ON of -2 so when there’s O7 the total is -12. Sodium is in group 1 so has an ON of +1 that means with two of them it’s overall ON is +2. When you combine the two that equals -12 but you want it to equal 0. So it would be +12. Considering there are two chromium present you would divide that by 2 making the answer +6.

Answer: Arctic Circle, Tropic of Cancer, Equator, Tropic of Capricorn, and the Antarctic Circle.  Hope this helps.

the correct amswer is 4.17g