will there eventually be 0% remaining of mercury-203?explain your thinking.

Answer:

See explanation and image attached

Explanation:

According to Markovnikov regiochemistry, the negative part of the addendum is joined to the more substituted carbon atom. The addition of H-OH to alkynes occurs in the presence of mercury(II) sulfate as a Lewis acid catalyst.

So, the -OH group is added to the highly substituted carbon and the H adds to the less highly substituted carbon.

The enol produced is shown in the mechanism attached to this answer. Rearrangement of this enol form due to keto-enol tautomerism yields the ketone as shown.

Image credit: chemistry steps

Therefore,  the mass in grams of the dihydrate H2C2O4 • 2 H2O (molar mass = 126.0 g/mol) is needed in order to make 100.0 mL of a 0.356 M solution of H2C2O4 is 4.49g.

To calculate the  mass in grams of the dihydrate H2C2O4 • 2 H2O we first need to find the moles of H2C2O4.

Moles of solute = molarity * litres in solution.

             = 0.356 *0.01L=0.0356moles.

since dihydrate H2C2O4 • 2 H2O  has molar mass of 126.0g/mol it means it has a mass of 126g.

By using mole to mass conversion.

mass of H2C2O4 • 2 H2O= moles of H2C2O4 • 2 H2O * molar mass of H2C2O4 • 2 H2O

mass of H2C2O4 • 2 H2O= 0.0356moles * 126glmol

                                         =4.49g.

Therefore,  the mass in grams of the dihydrate H2C2O4 • 2 H2O (molar mass = 126.0 g/mol) is needed in order to make 100.0 mL of a 0.356 M solution of H2C2O4 is 4.49g.

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Answer:

-4.29 x 10^-5, -9.3 x 10^-2, and then the least is -1.370 x 10^6

Explanation:

Now use common sense.

-0.093 is the greatest number.

Then -429,000 is in the middle.

Lastly, -1,370,000 is the least number.

Why?

Because as a negative number gets bigger, the more least the number is. It is the opposite of positive numbers. For positive numbers, as a number gets bigger, the more greater the number is. That is a rule.

Hope it helped!

Answer:

2 K(s) + Cl₂(g) ⟶ 2 KCl(s)

2 Cu(s) + O₂(g) ⟶ 2 CuO(s)

Explanation:

Both reactions are synthesis reactions (two substances combine to form another).

Reaction: K(s) + Cl₂(g) ⟶

The product is the binary salt KCl. The balanced chemical equation is:

2 K(s) + Cl₂(g) ⟶ 2 KCl(s)

Reaction: Cu(s) + O₂(g) ⟶

The most likely product is the metal oxide CuO. The balanced chemical equation is:

2 Cu(s) + O₂(g) ⟶ 2 CuO(s)

Answer:

cannot be measure

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_BaS + _PtF2 → _BaF2 + _Pts

Barium Sulfide + Platinum(II) Fluoride = Barium Fluoride + Platinum(II) Sulfide.

=> 1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS

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Answer:

Water has both the higher surface tension and viscosity

Explanation:

Water has stronger intermolecular forces

Water has a higher viscosity and surface tension than methanol.

Water has a high melting and boiling point irrespective of its low relative molecular mass because of strong intermolecular hydrogen bonding in the liquid.

This strong intermolecular hydrogen bonding also accounts for its high viscosity and surface tension. Surface tension is a force acting along the surface of a liquid that makes it behave like a stretched elastic skin.

Methanol has a lesser magnitude of intermolecular hydrogen bonding compared to water hence it has less surface tension and viscosity compared to water.

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Answer:

warm air rises and cold air decreases

Explanation:

cold: The absorbed energy moves and expands the molecules in the air, thus reducing the air density  

hot: Hot air increases because it expands when you heat air.

Answer:

warm air rises and cold air decreases

Explanation:

cold: The absorbed energy moves and expands the molecules in the air, thus reducing the air density

hot: Hot air increases because it expands when you heat air.

Chemistry =>The periodic table => Ion

Ions form when a neutral element gains or loses electrons. The number of electrons you gain or lose will depend on the valence electrons, that is, the electrons in the last energy level.

When the valence electrons are less than 4, the element will lose its electrons when it becomes an ion. If the element has more than 4 valence electrons, it will tend to gain electrons when becoming an ion.

Let's see the valence electrons of the elements, the valence electrons can be found in the periodic table:

I. Hydrogen: 1 valence electron

II. Helium: 2 valence electron (It is a noble gas with one energy level)

III. Iron: 2 valence electron

IV. Fluorine: 7 valence electron

V. Gallium: 3 valence electron

We see that elements that have less than 4 valence electrons are Hydrogen, Helium, Iron, and Gallium.

Helium is a special case since it has a single energy level with two electrons, so it is a stable element and it will hardly become an ion. So, we do not take helium into account.

Therefore, the answer will be Hydrogen, Iron, and Gallium.

Answer: D. I, III, and V

Answer:

Atoms only share electrons in covalent bonds. covalent bonds are only formed between nonmetals. there are two different types of covalent bonds; polar and nonpolar. in a polar covalent bonds electrons are shared unequally because one atom has a stronger force of attraction than the other (EX. H2O). In a nonpolar covalent bond, the electrons are shared equally because they're electronegativity is also equal (EX. Cl2).

Overall, the atoms electronegativity determines the way it shares electrons

Answer:

The molar mass of NaOH is given to be 39.99 g/mol. Therefore, we need 59.985 grams of NaOH.

Explanation:

Answer:

30 neutrons

Explanation:

The term that the scientist would use in this case is partial pressure. Option D

The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.

When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.

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Answer:

5) C

6) D

7) D

8) C

Explanation:

Answer:

Is this an actual question that you had for school?

Explanation:

Answer:

3/5. Its still really stressful but at least it's better than 2020.

Answer:

The lowest point on a wave?

The lowest point on the wave is called as through or wave through.

The highest point on the wave is known as the crest or wave crest

The space between the crests is called the wave length.

The distance between the wave crest and the wave trough is called the wave height.

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Answer:

Trough

Explanation:

The trough is the lowest point on a wave. The highest point on a wave is called a crest.

Answer:

39.119 g

Explanation:

1 mole of S has 32.065 g

=> 1.22 x 32.065 = 39.1193 or 39.119 g

Research more Respiration

INFORMATION:

We have the next compound:

And we must find the oxidation state of the nitrogen.

STEP BY STEP EXPLANATION:

To find the oxidation state of an element, we need to use the next general rules

Now, using that in a neutral compound all oxidation numbers must add up to zero we have the next equation

Then, since the Na is on the group one of the periodic table, Na has a plus one oxidation number and for Oxygen is -2. So,

Oxidation state Na = number of Na in the compound(oxidation number) = 3(+1) = +3

Oxidation state N = x (we don't know it yet)

Oxidation state O = number of O in the compound(oxidation number) = 2(-2) = -4

Finally, replacing in the equation and solving for x

ANSWER:

The oxidation state of the nitrogen in Na3NO2 is +1

Answer:

It's because they aren't destroyed they're just rearranged differently to create different products. There's like a name for this. It's something like the law of conservation energy. But the reason is mass cannot be created nor can it be destroyed.

Answer:

Atoms don’t appear or disappear during the reaction. Instead, they get rearranged.

Explanation:

Exact answer from Plato/Edmentum!! :)

Particles in a metal are held together by Covalent attractions. These are the strongest attraction or types of bonding

The bonds that hold atoms together to form molecules are called covalent bonds. They are pretty tough and not easily made or broken apart. It takes energy to make the bonds and energy is released when the bonds are broken.

For example, there is a covalent bonding between a Chlorine molecule. the two chlorine atoms are held strongly via covalent bonds.

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Answer:

C. Microwave

Explanation:

Therefore, the utility device with the lowest energy in the electromagnetic spectrum would be the one that emits radiation with the lowest frequency and longest wavelength, which is on the left side of the spectrum.

Satellite dishes and cellphones use radio waves, which have longer wavelengths and lower frequencies than microwaves, so they have slightly higher energies. X-rays, on the other hand, have much higher frequencies and shorter wavelengths than microwaves, making them much more energetic.

Therefore, the answer is C. Microwave.

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Answer:

The total amount of heat is 250.64 kcal.

Explanation:

Given that,

Total amount of heat = 2.000 kg

Temperature of snow = -15.00°C

Temperature of water = 38.00°C

Heat of fusion of water = 1.44 kcal/mol

Specific heat of solid water = 0.488 cal/g°C

Specific heat of liquid = 1.00 cal/g°C

We need to calculate the heat required to bring temperature -15°C to 0°C snow

Using formula of heat

\(Q_{1}=mc_{p}\Delta T\)

Put the value into the formula

\(Q_{1}=2000\times0.488\times(0+15)\)

\(Q_{1}=14640\ cal\)

\(Q_{1}=14.640\ kcal\)

We need to calculate the heat required to convert 0°C snow  into 0°C water

Using formula of heat

\(Q_{2}=ml\)

Put the value into the formula

\(Q_{2}=\dfrac{2000}{18}\times1.44\)

\(Q_{2}=160\ kcal\)

We need to calculate  heat required to increases temperature of water from 0°C  to 38°C

Using formula of heat

\(Q_{3}=mc_{p}\Delta T\)

Put the value into the formula

\(Q_{3}=2000\times1.00\times(38-0)\)

\(Q_{3}=76000\ cal\)

\(Q_{3}=76\ kcal\)

We need to calculate the total heat

Using all heat amount

\(Q=Q_{1}+Q_{2}+Q_{3}\)

Put the value into the formula

\(Q=14.640+160+76\)

\(Q=250.64\ kcal\)

Hence, The total amount of heat is 250.64 kcal.

Answer: Planetary scientists have long believed that our moon formed following a collision between Earth and another planet, but studies of Earth and moon rocks suggest ... in its history, Earth was struck a glancing blow by a Mars-sized planet. ... Oxygen, for example, comes in different varieties, called isotopes.The Giant Impact, as pictured in a painting by William K. Hartmann on the ...

Explanation: I hope this was very helpful and A Mars-sized object known as Theia (“mother of the Moon”) crossed into Earth's orbit, ... If this giant impact theory is correct, there should be evidence ... which suggest Theia struck Earth with a glancing blow, the new work implies ... and 18O/16O ratios, scientists can infer different planetary origins by taking ..

This is evident from the conclusion because the sentence includes the justification, the appropriate verb, and the correct pronoun, it supports the conclusion that pure gold is too soft.

Conclusion is defined as the concluding paragraph of a research paper, essay, or article that provides a summary of the whole thing.

It can also be defined as a end part that restates the writing's underlying themes and ideas.

Reiterating the speech's thesis, summarizing the key ideas covered in the speech, and using a finishing device that helps viewers form a lasting impression are the three fundamental components of a good conclusion.

Thus, this is evident from the conclusion because the sentence includes the justification, the appropriate verb, and the correct pronoun, it supports the conclusion that pure gold is too soft.

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The nonmetals in the Groups 16 and 17 gain electrons making them an anion.

The nonmetals of group 16 are made up of Oxygen, Sulfur, and Selenium whereas group 17, also called the halogen group is made up of Fluorine, Chlorine, etc.

The further right we go in the periodic table, the atomic size decreases. Due to the increase in the number of protons, the electrons are more tightly bound and the atom shows strong attraction to electrons.  

The gain of additional electrons helps in the completion of octets for the atoms further making their configuration stable, and more alike to that of the noble gases.

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The mass percentage is an important method to determine the concentration of a solution. Here among P₂O₃ and P₂O₅, the oxide P₂O₃ contains higher percentage of phosphorous.

The mass percentage of a component can be defined as the ratio of the mass of that particular component in the compound to the total mass of the compound. It can be expressed as:

Mass percentage = Mass of the component / Total mass of the component × 100

Molar mass of P₂O₃ = 110 g/mol

Molar mass of P₂O₅ = 142 g/mol

a. % of 'P' in P₂O₃ = 2 × 31 / 110 × 100 = 56.4 %

   % of 'P' in P₂O₅ = 2 × 31 / 142 × 100 = 43.66 %

Thus P₂O₃ has higher percentage of 'P'.

b. 1 mol O₂ × 4 P /3 O₂ × 31.0 P / 1 mol P = 41.3 g P

c. P₄O₁₀

d. Aluminium oxide - Al₂O₃

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Answer:

N₂ + 3H₂ → 2NH3

4Fe + 2Cl₂ → 4FeCl

Explanation:

This equations are now balanced

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The statements that best support the student’s claim is that

A cell is described as the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body.

A cell has three main parts which include :

The cell membrane surrounds the cell and controls the substances that go into and out of the cell.

In conclusion, Cells are the basic building blocks of all living things.

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